English Bulldog at 06:08

Some individuals of this breed are prone to interdigital cysts, which are cysts that form between the toes. These cause the dog some discomfort, but are treatable either by vet or an experienced owner and they also suffer respitory problems

Other problems can include cherry eye, a protrusion of the inner eyelid (which can be corrected by a veterinarian), certain allergies, and hip issues in older bulldogs.Puppies are frequently delivered by Caesarean section because their characteristically large heads can become lodged in the mother's birth canal during natural birth. However, it is not entirely uncommon for a bulldog to whelp naturally and successfully.

The folds or "rope" on a Bulldogs face should be cleaned daily to avoid unwanted infections caused by moisture accumulation. Also, some bulldogs' naturally curling tails can be so tight to the body as to require regular cleaning and a bit of ointment.

Like all dogs, bulldogs require daily exercise. If not properly exercised it is possible for a bulldog to become overweight, which could lead to heart and lung problems, as well as joint issues.

Bulldogs are extremely sensitive to heat. Extra caution should be practiced in warmer climates and during summer months. Bulldogs must be given plenty of shade and water, and must be kept out of standing heat.

In January 2009, after the BBC documentary Pedigree Dogs Exposed, the The Kennel Club introduced revised breed standards for the British Bulldog, along with 209 other breeds, to address health concerns. Opposed by the British Bulldog Breed Council, it was speculated by the press that the changes would lead to a smaller head, less skin folds, a longer muzzle, and a taller thinner posture, in order to combat perceived problems with respiration and with breeding due to head size and posture. The large head also means that cesarean sections are often required during birth. About 70% of dogs will deveop hip dysplasia and many will require hip replacement surgery. This means the bulldog owners will incur significant cost for veterinary care during the life of their pets

The bulldog is a breed with characteristically thick shoulders and a matching head. There are generally thick folds of skin on a bulldog's brow, followed by round, black, wide-set eyes, a short muzzle with characteristic folds called "rope" above the nose, drooping lips, and pointed teeth. The coat is short, flat and sleek, with colors of red, fawn, white, brindle (mixed colors, often in waves or irregular stripes), and piebalds of these.

In the US, the size of a typical mature male is about 50 pounds and that for mature females is about 45 pounds. In the United Kingdom, the breed standard is 55 pounds for a male and 50 pounds for a female, though it is not uncommon for males to be 60 pounds.

While some canine breeds require their tails to be cut or docked soon after birth, bulldogs are one of very few breeds whose tail is naturally short and curled. A longer upright or "gay" tail is a serious fault in a show bulldog.

The term "bulldog" was first used around 1568 and might have been applied to other various ancestors of modern bulldog breeds before adorning the breed we recognize today.

It has been theorized that bulldogs were bred in England as a cross between the Mastiff and the Pug, though their genetic origin is debated. Since the pug did not arrive in Europe until the late 16th century, it is unlikely that the breed is an original progenitor of the Bulldog. The Bulldog and the Mastiff are widely thought to have common roots in the ancient Pugnaces Britanniae of Great Britain.

In the 1600s, bulldogs were used for bullbaiting (as well as bearbaiting)--a gambling sport popular in the 17th century with wagers laid while trained bulldogs leapt at a bull lashed to a post. The bulldog's typical means of attack included latching onto the animal's snout and attempting to suffocate it.
However, the bulldog's early role was not limited to sport. In mid-17th century New York, bulldogs were used as a part of a city-wide round-up effort led by governor Richard Nicolls. Because cornering and leading wild bulls was dangerous, bulldogs were trained to seize a bull by its nose long enough for a rope to be secured around its neck. The use of dogs for fighting with other dogs or other animals was banned in the United Kingdom by the Cruelty to Animals Act 1835, but Bulldogs as pets were continually promoted by dog dealer Bill George.

In time, the original Old English Bulldogwas crossed with the pug. The outcome was a shorter, wider dog with a brachycephalic skull. Though today's bulldog looks tough, he cannot perform the job he was originally created for, as he cannot withstand the rigors of running and being thrown from a bull, and cannot grip with such a short muzzle.

Champion Rodney Stone, 1907The oldest single breed specialty club is The Bulldog Club (England), which was formed in 1878. Members of this club met frequently at the Blue Post pub on Oxford Street in London. There they wrote the first standard of perfection for the breed. In 1891 the two top bulldogs, Orry and Dockleaf, competed in a contest to see which dog could walk the farthest. Orry was reminiscent of the original bulldogs, lighter boned and very athletic. Dockleaf was smaller and heavier set, more like modern bulldogs. Dockleaf was declared the winner that year. Although some argued that the older version of the bulldog was more fit to perform, the modern version’s looks won over the fans of the breed because they proved they were equally as fit and athletic in the walking competition.

At the turn of the 20th century, Ch. Rodney Stone became the first Bulldog to command a price of $5000 when he was bought by controversial Irish-American political figure Richard Croker.

Doberman Pinscher at 11:22

Doberman Pinschers are the target of a mistaken stereotype of ferocity and aggression. As a personal protection dog, the Doberman was originally bred for these traits: it had to be large and intimidating, fearless and willing to defend its owner, but sufficiently obedient and restrained to only do so on command. These traits served the dog well in its role as a personal defense dog, police dog or war dog, but were not ideally adapted to a companionship role. In recent decades, the Doberman Pinscher's size, short coat, and intelligence made it a desirable house dog. Although these dogs are mistaken for their aggression, they are extremely loyal. They can easily learn to 'Respect and Protect' their owners. In response, they are excellent guard dogs that protect the ones they love. There is evidence that Doberman Pinschers in North America are calmer than their European counterparts because of these breeding strategies. Because of these differences in breeding strategies, different lines of Doberman Pinschers have developed different traits. Although many contemporary Doberman Pinschers in North America are gentle, loyal, loving, and intelligent dogs, some lines are bred more true to the original personality standard.

Although the stereotype is largely mistaken, the personality of the Doberman Pinscher is peculiar to the breed. There is a great deal of scientific evidence that Doberman Pinschers have a number of stable psychological traits, such as personality factors and intelligence. As early as 1965, studies have shown that there are several broad behavioral traits that significantly predict behavior and are genetically determined. Subsequently, there have been numerous scientific attempts to quantify canine personality or temperament by using statistical techniques for assessing personality traits in humans. These studies often vary by identifying different personality factors, and by ranking breeds differently along these dimensions. One such study found that Doberman Pinschers, compared to other breeds, rank high in playfulness, average in curiosity/fearlessness, low on aggressiveness and low on sociability. Another such study ranked Doberman Pinschers low on reactivity/surgence, and high on aggression/disagreeableness and openness/trainability.

In addition to the studies of canine personality, there has been some research to determine whether there are breed differences in aggression. In a recent study, aggression was divided into four categories: aggression directed at strangers, owner, other strange dogs and rivalry with other household dogs. This study found that the Doberman Pinscher ranked relatively high on stranger-directed aggression (behind the Dachshund and Chihuahua), but extremely low on owner-directed aggression. The Doberman Pinscher ranked as average on dog-directed aggression and dog rivalry. Looking only at bites and attempted bites, Doberman Pinschers rank as far less aggressive towards humans, and show less aggression than many breeds without a reputation (e.g., Cocker Spaniel, Border Collie and Great Dane). This study concluded that aggression has a genetic basis, that the Doberman shows a distinctive pattern of aggression depending on the situation, and that contemporary Doberman Pinschers are not an aggressive breed overall.

Although recent studies do not rank Doberman Pinschers as the most aggressive breed, their size, strength and aggression towards strangers makes them potentially dangerous. Studies of dog bites and dog bite fatalities have shown that the danger of attack by Dobermans is relatively high, and that children are five times as likely to be bitten by a Doberman as a Labrador Retriever. According to the Centers for Disease Control and Prevention, between 1979 and 1998, the Doberman Pinscher was involved in attacks on humans resulting in fatalities less frequently than several other dog breeds such as pit bull–type dogs, German Shepherd Dogs, Rottweilers, Husky-type, Wolf-dog hybrids and Alaskan Malamutes. According to this Center for Disease Control and Prevention study, one of the most important factors contributing to dog bites are related to the level of responsibility exercised by dog owners.

On average, Doberman Pinschers live about 10–14 years, and they frequently suffer from a number of health concerns. Common serious health problems include dilated cardiomyopathy, cervical vertebral instability (CVI),[27] von Willebrand's disease (a bleeding disorder for which there is genetic testing), and prostatic disease. Less serious common health concerns include hypothyroidism and hip dysplasia.


Studies have shown that the Doberman Pinscher suffers from prostatic diseases, (such as bacterial prostatiti, prostatic cysts, prostatic adenocarcinoma, and benign hyperplasia) more than any other breed. Neutering can significantly reduce these risks (see Dog for information).

Dilated cardiomyopathy is a major cause of death in Doberman Pinschers. This disease affects Dobermans more than any other breed. Nearly 40% of DCM diagnoses are for Doberman Pinschers, followed by German Shepherds at 13%. Research has shown that the breed is affected by an attenuated wavy fiber type of DCM that affects many other breeds, as well as an additional, fatty infiltration-degenerative type that appears to be specific to Doberman Pinscher and Boxer breeds. This serious disease is likely to be fatal in most Doberman Pinschers affected Across multiple studies, more than half of the Doberman Pinschers studied develop the condition. Roughly a quarter of Doberman Pinschers who developed cardiomyopathy died suddenly from unknown causes, and an additional fifty percent died of congestive heart failure In addition to being more prevalent, this disease is also more serious in Doberman Pinschers. Following diagnosis, the average non-Doberman has an expected survival time of 8 months; for Doberman Pinschers, the expected survival time is less than 2 months. Although the causes for the disease are largely unknown, there is evidence that it is a familial disease inherited as an autosomal dominant trait. Investigation into the genetic causes of canine DCM may lead to therapeutic and breeding practices to limit its impact.

Rottweiler at 08:47

Although a versatile breed used in recent times for many other purposes, the Rottweiler is primarily known as one of the oldest of herding breeds. A multi-faceted herding and stock protection dog, it is capable of working all kinds of livestock under a variety of conditions.

The breed is an ancient one, whose history stretches back to the Roman Empire. In those times, the legions traveled with their meat on the hoof and required the assistance of working dogs to herd the cattle. One route the army traveled was through Württemberg and on to the small market town of Rottweil. The principal ancestors of the first Rottweilers during this time was supposed to be the Roman droving dog, local dogs the army met on its travels, and dogs with molosser appearance coming from England and The Netherlands.

This region was eventually to become an important cattle area, and the descendants of the Roman cattle dogs proved their worth in both driving and protecting the cattle from robbers and wild animals. Rottweilers were said to have been used by travelling butchers at markets during the middle ages to guard money pouches tied around their necks.  However, by the end of the 19th century as railroads became the main method for moving stock to market, the breed had declined so much that in 1900 there was only one female to be found in the town of Rottweil.

The build up to World War I saw a great demand for police dogs, and that led to a revival of interest in the Rottweiler. During the First and Second World Wars, Rottweilers were put into service in various roles including as messenger, ambulance, draught, and guard dogs.

The first Rottweiler club in Germany, named DRK ("Deutscher Rottweiler-Klub" — German Rottweiler Club) was created the 13 January 1907, and followed by the creation of the SDRK ("Süddeutscher Rottweiler-Klub" — South German Rottweiler Club) on the 27 April 1907 and became the IRK (International Rottweiler Club). The DRK counted around 500 Rottweiler, the SDRK 3000 Rottweilers. The goals of the two clubs were different. The DRK wanted to produce working dogs and did not emphasize the morphology of the Rottweiler. The main stud dog of this club was Lord von der Teck. The IRK tried to produce a homogeneous morphology according to their standard. One of the main stud dogs of this club was Ralph von Neckar.

The various German Rottweiler Clubs amalgamated to form the German General Rottweiler Club (Allgemeiner Deutscher Rottweiler Klub - e.V) usually known by it's German Initials as "the ADRK", in 1921. This was offically recorded in the register of clubs and associations at the district court of Stuttgart on Janaury 27th, 1924.  The ADRK is recognised worldwide as the home club of the Rottweiler.

In 1935 the Rottweiler was officially recognized by the American Kennel Club. In 1936, Rottweilers were exhibited in Britain at Crufts. In 1966, a separate register was opened for the breed. In fact, in the mid 1990s, the popularity of the Rottweiler reached an all time high with it being the 1st most registered dog by the American Kennel Club.

According to the American Kennel Club the Rottweiler has a natural gathering style with a strong desire to control. They generally show a loose-eye and have a great amount of force while working well off the stock. They make much use of their ability to intimidate.

The Rottweiler will often carry the head on an even plane with the back or carry the head up but have the neck and shoulders lowered. Some females will lower the entire front end slightly when using eye. Males will also do this when working far off the stock in an open field. This is rarely seen in males when working in confined spaces such as stock yards.

The Rottweiler has a reasonably good natural balance, force-barks when necessary and when working cattle uses a very intimidating charge. There is a natural change in forcefulness when herding sheep. When working cattle he may use his body and shoulders and for this reason should be used on horned stock with caution.

The Rottweiler, when working cattle, will search out the dominant animal and challenge it. Upon proving his control over that animal he will settle back and tend to his work.

Some growers have found that Rottweilers are especially suited to move stubborn stock that simply ignore Border Collies, Kelpies, etc. A Rottweiler will use their body to physically force the stubborn animal to do his bidding if necessary.

When working sheep the Rottweiler shows a gathering/fetching style and reams directions easily. He drives sheep with ease.

If worked on the same stock for any length of time the Rottweiler tends to develop a bond with the stock and will become quite affectionate with them as long as they do as he says.

The skull is of medium length, broad between the ears. The forehead line is moderately arched as seen from the side. The occipital bone well developed without being conspicuous. The stop is well defined.

The Rottweiler nose is well developed, more broad than round with relatively large nostrils and always black. The muzzle should appear neither elongated nor shortened in relation to the cranial region. The nasal bridge is broad at the base and moderately tapered.

The lips are black and close fitting with the corner of the mouth not visible. The gums should be as dark as possible.

Both the upper and lower jaws are strong and broad. According to the FCI Standard Rottweilers should have strong and complete dentition (42 teeth) with scissor bite, the upper incisors closely overlapping the lower incisors.

The zygomatic arches should be pronounced. The eyes should be of medium size, almond-shaped and dark brown in colour. The eyelids are close fitting.

The ears are medium-sized, pendant, triangular, wide apart, and set high on the head. With the ears laid forward close to the head, the skull appears to be broadened.

The skin on the head is tight fitting overall. When the dog is alert, the forehead may be slightly wrinkled.

Strong, of fair length, well muscled, slightly arched, clean, free from throatiness, without dewlap and very long neck

The back is straight, strong and firm. The loins are short, strong and deep. The croup is broad, of medium length, and slightly rounded, neither flat nor falling away. The chest is roomy, broad and deep (approximately 50 % of the shoulder height) with a well developed forechest and well sprung ribs. The flanks are not tucked up.

An undocked Rottweiler in profileNatural bob tailed or if present the tail was historically docked. Docking is banned in Germany, the U.K and some other countries. An un-docked Rottweiler tail is level in extension of the upper line; at ease it may be hanging.




                                  

German Sheferd at 08:05

German Shepherds were bred specifically for their intelligence, a trait for which they are now renowned. They are considered to be the third most intelligent breed of dog, behind Border Collies and Poodles. In the book The Intelligence of Dogs, author Stanley Coren ranked the breed third for intelligence. He found that they had the ability to learn simple tasks after only five repetitions and obeyed the first command given 95% of the time. Coupled with their strength, this trait makes the breed desirable as police, guard, and search and rescue dogs, as they are able to quickly learn various tasks and interpret instructions better than other large breeds.

Many common ailments of the German Shepherds are a result of the inbreeding required early in the breed's life. One such common issue is hip and elbow dysplasia which may lead to the dog experiencing pain in later life, and may cause arthritis.An additional problem affecting the spine is spinal stenosis. These skeletal problems are mainly due to a deliberate selection for a sloping back line (in wild canids, such as wolves, the back line is not sloping but horizontal).[citation needed] Due to the large and open nature of their ears, Shepherds are prone to ear infections. German Shepherds, like all large bodied dogs, are prone to bloat.

The average lifespan of a German Shepherd is 9 - 14 years, which is normal for a dog of their size. According to a study conducted by the University of Florida, Degenerative Myelopathy, or DM is a neurological disease that occurs with enough regularity specifically in the breed to suggest the disease is one that is genetically predisposed in German Shepherd Dogs.  Additionally, German Shepherd Dogs have a higher than normal incidence of Von Willebrand Disease, a common inherited bleeding disorder.

German Shepherds are a very popular selection for use as working dogs. They are especially well known for their police work, being used for tracking criminals, patrolling troubled areas, and detection and holding of suspects. Additionally thousands of German Shepherds have been used by the military. Occasionly, these intelligent creatures are used as seeing eye dogs. Usually trained for scout duty, they are used to warn soldiers to the presence of enemies or of booby traps or other hazards. German Shepherds have been trained by military groups to parachute from aircraft.

The German Shepherd Dog is one of the most widely-used breeds in a wide variety of scent-work roles. These include search and rescue, cadaver searching, narcotics detection, explosives detection, accelerant detection, and mine detection dog, amongst others. They are suited for these lines of work because of their keen sense of smell and their ability to work regardless of distractions.
At one time the German Shepherd Dog was the breed chosen almost exclusively to be used as a guide dog for the visually impaired. In recent years, Labrador and Golden Retrievers have been more widely used for this work, although there are still German Shepherds being trained. A versatile breed, they excel in this field due to their strong sense of duty, their mental abilities, their fearlessness, and their attachment to their owner.



                                                   

Labrador Retriever at 06:39

History

The modern labrador's ancestors originated on the island of Newfoundland, now part of the province of Newfoundland and Labrador, Canada. The breed emerged over time from the St. John's Water Dog, also an ancestor of the Newfoundland dog (to which the Labrador is closely related), through ad-hoc breedings by early settlers in the mid to late 16th century. The original forebears of the St. John's dog are not known, but are likely a random-bred mix of English, Irish, and Portuguese working breeds. From the St. John's Dog, two breeds emerged; the larger was used for hauling, and evolved into the large and gentle Newfoundland dog, likely as a result of breeding with mastiffs brought to the island by the generations of Portuguese fishermen who had been fishing offshore since the 1600s. The smaller short-coat retrievers used for retrieval and pulling in nets from the water were the forebears of the English-bred Labrador Retriever. The white chest, feet, chin, and muzzle - known as tuxedo markings - characteristic of the St. John's Dog often appear in Lab mixes, and will occasionally manifest in Labs as a small white spot on the chest (known as a medallion) or stray white hairs on the feet or muzzle.

The St. John's area of Newfoundland was settled mainly by the English and Irish. Local fishermen originally used the St. John's dog to assist in bringing nets to shore; the dog would grab the floating corks on the ends of the nets and pull them to shore. A number of these were brought back to the Poole area of England in the early 1800s, then the hub of the Newfoundland fishing trade, by the gentry, and became prized as sporting and waterfowl hunting dogs. A few kennels breeding these grew up in England; at the same time a combination of sheep protection policy (Newfoundland) and rabies quarantine (England) led to their gradual demise in their country of origin.

A surviving picture of Buccleuch Avon (b.1885), the foundational dog of many modern Labradors.The first and second Earls of Malmesbury, who bred for duck shooting on his estate, and the 5th and 6th Dukes of Buccleuch, and youngest son Lord George William Montagu-Douglas-Scott, were instrumental in developing and establishing the modern Labrador breed in nineteenth century England. The dogs Avon ("Buccleuch Avon") and Ned given by Malmesbury to assist the Duke of Buccleuch's breeding program in the 1880s are usually considered the ancestors of all modern Labradors.

                                                                     

                                                                     Aperance
 
Labradors are relatively large, with males typically weighing 29–41 kg (65-90 pounds) and females 25–32 kg (55–71 lb). Labs weighing close to or over 100 lbs are considered obese or having a major fault under American Kennel Club standards, although some labs weigh significantly more. The majority of the characteristics of this breed, with the exception of colour, are the result of breeding to produce a working retriever.
 

As with some other breeds, the Conformation (typically "English", "show" or "bench") and the Field (typically "American" or "working") lines differ, although both lines are bred in both countries. In general, however, Conformation Labs tend to be bred as medium-sized dogs, shorter and stockier with fuller faces and a slightly calmer nature than their Field counterparts, which are often bred as taller, lighter-framed dogs, with slightly less broad faces and a slightly longer nose; however Field labs should still be proportional and fit within AKC standards. With field labs, excessively long noses, thin heads, long legs and lanky frames are not considered standard. These two types are informal and not codified or standardised; no distinction is made by the AKC or other kennel clubs, but the two types come from different breeding lines. Australian stock also exists; though not seen in the west, they are common in Asia.

The breed tends to shed hair twice annually, or regularly throughout the year in temperate climates. Some labs shed a lot; however, individual labs vary. Labrador hair is usually fairly short and straight, and the tail quite broad and strong. The otter-like tail and webbed toes of the Labrador Retriever make them excellent swimmers. Their interwoven coat is also relatively waterproof, providing more assistance for swimming.

Canecorso at 06:15

As a recently recovered breed, the Cane Corso's history is shrouded in mystery and differing opinions. It is generally agreed that the Cane Corso is a farm dog which has been used for stock control, property and personal protection and big game hunting throughout its history. The breed was recovered from near extinction through the efforts of enthusiasts in the 1980s, the Corso is now popular globally, as can be seen by Lebron James, Laila Ali, and Tracy Morgan's ownership of Cane Corsos.


The Corso is likely derived from the same root stock as the Neapolitan Mastiff; the historically documented Roman war dog "Canes Pugnaces". The Corso favours agility and speed, where the Neapolitan is known for power and strength.

At their October 2009 meeting the American Kennel Club Board of Directors approved a proposal that made the Cane Corso eligible for full AKC registration on June 1, 2010 and eligible to compete in all AKC competitions as a part of the Working Group starting June 30, 2010

The Cane Corso ('kha-nay kor-so') is a large Italian molosser. It is well muscled and looks more athletic than most other mastiffs, tending less toward sheer bulk like the English Mastiff and more towards definition like the original Old English Bulldog. The official FCI standard calls for dogs to stand from 62-69cm (23.6-26.7 inches) at the withers, with females in the lower range and males in the higher. Weight should be in keeping with the size and stature of these dogs, ranging from 40-50 kg (88-110lbs). The overall impression should be of power balanced with athleticism.


Its ears are naturally dropped forward, but where legal, many breeders crop them short and close to the head so that the remaining stubs stand upright. Its muzzle is as wide as it is long. This head size also means a superior bite strength. Most Corsos have docked tails as well. The standard calls for docking at the 4th vertebra, although often they are docked shorter.

Corsos appear in two basic coat colours: black and fawn. This is further modified by genetic pigment dilution to create blue (from black) and formentino (from fawn) colours. Brindling of varying intensity is common on both basic coat colours as well, creating tigrato (full brindle), black brindle, and blue brindle. Fawn also has a number of different expressions, ranging from the pale of a formentino to 'red' to the more common beige colour, with the back coat hairs tipped with black. In blue dogs, the nose can appear grey, but should be darker than the coat. In all other dogs, the nose should be black. White markings on the chest, toes and on the chin and nose are seen as well, with smaller white patches being preferable.