English Mastiff

The English Mastiff is a breed of extremely large dog (often known simply as the Mastiff) perhaps descended from the ancient Alaunt and Pugnaces Britanniae, with a significant input from the Alpine Mastiff in the 19th century. Distinguished by its enormous size, massive head, short coat in a limited range of colours, but always displaying a black mask, the Mastiff is noted for its gentle and loving nature. The lineage of modern dogs can be traced back to the early 19th century, but the modern type was stabilised in the 1880s and refined since. Following a period of sharp decline, the Mastiff has increased its worldwide popularity. Throughout its history, the Mastiff has contributed to the development of a number of dog breeds, some generally known as Mastiff-type dogs, or, confusingly, just as "Mastiffs".

Appearance

With a massive body, broad skull and head of generally square appearance, it is the largest dog breed in terms of mass. It is on average slightly heavier than the Saint Bernard, although there is a considerable mass overlap between these two breeds. Though the Irish Wolfhound and Great Dane can be more than six inches taller, they are not nearly as robust.

The body is large with great depth and breadth, especially between the forelegs, causing these to be set wide apart. The length of the body taken from the point of the shoulder to the point of the buttock is greater than the height at the withers. The AKC standard height (per their website) for this breed is 30 inches (76 cm) at the shoulder for males and 27.5 inches (70 cm) (minimum) at the shoulder for females. A typical male can weigh 150–250 pounds (68–113 kg), a typical female can weigh 120–200 pounds (54–91 kg), with very large individuals reaching 130 kg (286 lb) or more.

Coat colour standards

The former standard specified the coat should be short and close-lying. Long haired Mastiffs, called "Fluffies", are occasionally seen, due to a recessive gene, but this trait is not accepted by any kennel club. The colour is apricot-fawn, silver-fawn, fawn, or dark fawn-brindle, always with black on the muzzle, ears, and nose and around the eyes.

The Mastiff has a distinctive head with dewlap and flews. The black mask is visible even on this brindle.

The colours of the Mastiff coat are differently described by various kennel clubs, but are essentially fawn or apricot, or those colours as a base for black brindle. A black mask should occur in all cases. The fawn is generally a light "silver" shade, but may range up to a golden yellow. The apricot may be a slightly reddish hue up to a deep, rich red. The brindle markings should ideally be heavy, even and clear stripes, but may actually be light, uneven, patchy, faint or muddled. Pied Mastiffs occur rarely. Other non-standard colours include black, blue brindle, and chocolate (brown) mask. Some Mastiffs have a heavy shading caused by dark hairs throughout the coat or primarily on the back and shoulders. This is not generally considered a fault. Brindle is dominant over solid colour. Apricot is dominant over fawn, though that dominance may be incomplete. Most of the colour faults are recessive, though black is so rare in the Mastiff that it has never been determined whether the allele is recessive or a mutation that is dominant.

The genetic basis for the variability of coat in dogs has been much studied, but all the issues have not yet been resolved. On the basis of what is known (and remembering that, as dogs are diploid animals, each gene location (locus) appears twice in every animal, so questions of dominance also must be resolved), the gene possibilities allowed by the Mastiff standard are AyBDEmh(kbr_or_ky)mS. This describes a dog which is fawn with a dark nose, non-dilute, black-masked, non-harlequin, brindled or not brindled, non-merle, and non-spotted. To allow for the rare exceptions we must include "b" (brown mask and possible brown brindling), "d" (blue mask and possible blue brindling), "sp" (pied spotting), and perhaps "a" (recessive black). The possible combination of homozygous brown and homozygous blue is a pale brown referred to as isabella in breeds where it is relatively common. On a Mastiff, this would appear on mask, ears, and any brindling that was present. Speculative gene locations may also exist, so a Mastiff may be "I" (apricot) or "i" (non-apricot) and perhaps "cch" (silver lightening) or "C" (without silver lightening). (Note that this "C locus" may not be the same as the one identified in other animals, SLC45A2.)

Record size

The greatest weight ever recorded for a dog, 343 pounds (155.6 kg), was that of an English Mastiff from England named Aicama Zorba of La Susa, although claims of larger dogs, including Saint Bernards, Tibetan Mastiffs, and Caucasian ovcharkas exist. According to the 1989 edition of the Guinness Book of Records, in March 1989, when he was 7 years old, Zorba stood 37 inches (94 cm) at the shoulder and was 8 ft 3 in (251 cm) from the tip of his nose to the tip of his tail, about the size of a small donkey. After 2000, the Guinness Book of World Records stopped accepting largest or heaviest pet records.

Temperament

The Mastiff breed has a desired temperament, which is reflected in all formal standards and historical descriptions. Sydenham Edwards, wrote in 1800 in the Cynographia Britannica:

What the Lion is to the Cat the Mastiff is to the Dog, the noblest of the family; he stands alone, and all others sink before him. His courage does not exceed his temper and generosity, and in attachment he equals the kindest of his race. His docility is perfect; the teazing of the smaller kinds will hardly provoke him to resent, and I have seen him down with his paw the Terrier or cur that has bit him, without offering further injury. In a family he will permit the children to play with him, and suffer all their little pranks without offence. The blind ferocity of the Bull Dog will often wound the hand of the master who assists him to combat, but the Mastiff distinguishes perfectly, enters the field with temper, and engages in the attack as if confident of success: if he overpowers, or is beaten, his master may take him immediately in his arms and fear nothing. This ancient and faithful domestic, the pride of our island, uniting the useful, the brave and the docile, though sought by foreign nations and perpetuated on the continent, is nearly extinct where he probably was an aborigine, or is bastardized by numberless crosses, everyone of which degenerate from the invaluable character of the parent, who was deemed worthy to enter the Roman amphitheatre, and, in the presence of the masters of the worlds, encounter the pard, and assail even the lord of the savage tribes, whose courage was sublimed by torrid suns, and found none gallant enough to oppose him on the deserts of Zaara or the plains of Numidia.

The American Kennel Club sums up the Mastiff breed as:

a combination of grandeur and good nature as well as courage and docility. Domesticated Mastiffs are powerful yet gentle and loyal dogs, but due to their physical size and need for space, are best suited for country or suburban life.

Health

The Mastiff should at all stages of development show the breed characteristics of massiveness and sound, if cumbersome, movement. The Mastiff is a particularly large dog demanding correct diet and exercise. Excessive running is not recommended for the first two years of the dog's life, in order not to damage the growth plates in the joints of this heavy and fast-growing dog, which in some weeks may gain over 5 lb. However, regular exercise must be maintained throughout the dog's life to discourage slothful behaviour and to prevent a number of health problems. A soft surface is recommended for the dog to sleep on to prevent the development of calluses, arthritis, and hygroma (an acute inflammatory swelling). Due to the breed's large size, puppies may potentially be smothered or crushed by the mother during nursing. A whelping box, along with careful monitoring can prevent such accidents. The average lifespan of the Mastiff is about 7 years although it's not uncommon for some to live to 10–11 years.

Major problems can include hip dysplasia and gastric torsion. Minor problems include obesity, osteosarcoma, and cystinuria. Problems only occasionally found include cardiomyopathy, allergies, vaginal hyperplasia, cruciate ligament rupture, hypothyroidism, OCD, entropion, progressive retinal atrophy (PRA), and persistent pupillary membranes (PPM).

When purchasing a purebred Mastiff, experts often suggest that the dog undergo tests for hip dysplasia, elbow dysplasia, thyroid, and DNA for PRA.

A Mastiff may be kept in an apartment, but care must be taken to give it enough exercise. Mastiffs should be fed 2 or 3 times a day; it is believed that one large meal per day can increase the chance of gastric torsion.