Maine Coon

The Maine Coon is New England's native longhair: a large, shaggy, broad-chested cat shaped by cold winters and, by CFA's account, America's first show breed. Its origin stories involving bobcats and raccoons are legends — domestic cats cannot hybridize with either — and the breed's real ancestry is ordinary: shorthaired settlers' cats crossed with longhaired cats brought by sailors, then shaped by hard winters 1.

The popular image is of a gentle giant. The reality is a sociable but independent cat whose size, coat, and inherited heart and joint conditions ask more of an owner than the image suggests.

The breed took shape in New England, and its name ties it to Maine, where farmers kept longhaired mousers and showed them at local fairs. CFA's breed history recounts Maine Coons competing at the Skowhegan Fair in the 1860s and a dozen entered at a Boston show in January 1878; a brown tabby named Cosey won best in show at Madison Square Garden in 1895 1. CFA calls the Maine Coon America's first indigenous show cat. Early CFA records listed the breed simply as 'Maine Cats', a reminder that its identity was regional before it was formal 1.

The twentieth century was less kind. As pedigreed Persians and other longhairs rose in fashion, the Maine Coon faded from the registry and was declared extinct in the late 1950s — prematurely, as it turned out 1. Breeders rebuilt the breed through the 1960s and 1970s, and CFA granted championship status on 1 May 1976 21. The International Cat Association recognizes the Maine Coon and a separate polydactyl variety, and its standard calls the breed America's native longhaired cat 3.

A Maine Coon is large, but the standard is careful about it: quality should never be sacrificed for size, and no part of the cat should be exaggerated 2. Mature males commonly weigh 5.5 to 7 kg, with some reaching 9 kg or more; females are smaller, averaging roughly 4 to 5.5 kg according to CFA's breed history 1. The body is long and rectangular, the chest broad, the legs substantial, and the tail long and wide at the base.

The more important fact is timing. Maine Coons mature slowly, often not reaching full development until three or four years of age 1. A year-old cat that looks lanky is not necessarily undersized; it is unfinished. The breed's size also makes ordinary cat equipment — carriers, trees, litter boxes — feel small, and it lets weight gain hide under a heavy coat.

The coat is the breed's other defining feature: heavy and shaggy, shorter on the shoulders and longer on the belly and hindquarters, with a frontal ruff, a long flowing tail, and tufts between the toes 2. The texture is silky rather than woolly, and the coat is weather-resistant enough to have suited an unheated barn. It is also a commitment: regular combing is needed, more in spring and autumn, with particular attention behind the front legs and under the tail.

Colour is broad. CFA accepts solids, tabbies, tabby-and-white, parti-colours, smokes, and shaded patterns, and disqualifies chocolate, lavender, and pointed patterns as evidence of hybridization 2. The classic brown tabby with a white bib and paws remains the emblematic look, but black, blue, red, cream, and silver are all legitimate. Eye colour ranges from green to gold to copper.

Some Maine Coons have extra toes. In the breed, polydactyly is inherited as an autosomal dominant trait with incomplete penetrance and variable expressivity, and it is genetically heterogeneous: more than one mechanism is involved 4. Extra toes may appear on the forepaws, the hindpaws, or both 3.

Registries disagree about what to do with it. The CFA standard disqualifies an incorrect number of toes and specifies five in front and four behind 2. TICA recognizes a separate Maine Coon Polydactyl variety, allowing extra toes on either fore or hind paws, with mitten or patty feet 3. A polydactyl Maine Coon is therefore not a different breed, but it may be a different registration category — a distinction that matters to breeders and exhibitors more than to the cat on the sofa.

Breed descriptions call the Maine Coon gentle, loyal, and sociable, tolerant of children and other animals, and given to chirps and trills as well as the occasional meow 21. These are breed-club generalizations, not guarantees. In a questionnaire study in which veterinarians profiled cat breeds, the group containing the Maine Coon, Ragdoll, and Scottish Fold scored very low on aggressiveness and sensitivity — consistent with the popular picture, but based on observer ratings of breeds rather than controlled tests of individual cats 5.

The practical point is that temperament varies within a breed. A Maine Coon may be sociable and still prefer its own space; it may tolerate handling and still dislike being carried. The breed is often called dog-like because it follows people and plays with water, and many do. Others do not. Prospective owners should meet the individual cat and ask about its parents rather than rely on the label.

Hypertrophic cardiomyopathy is the most common heart disease of cats, affecting as many as one in seven, and most cases are subclinical 6. In the Maine Coon, a variant in the MYBPC3 gene — usually called A31P — was the first spontaneous mutation shown to cause familial HCM in a non-human species 7. The variant is not the whole story. Cats homozygous for A31P are primarily the ones that develop clinically important disease, penetrance is often below 100 percent, and echocardiography is required for diagnosis because a murmur may be absent 68.

That combination has practical consequences. A DNA test can identify carriers and homozygotes, but a carrier result does not prove a cat's heart is normal, and an affected cat may look healthy. Breeders therefore combine genetic testing with echocardiographic screening, and CFA describes both as instrumental to maintaining a healthy gene pool 2. No test can guarantee that a cat will never develop HCM; the aim is to reduce risk and to catch disease early.

Maine Coons are also prone to hip dysplasia. In the largest demographic study of the condition in the breed, 24.9 percent of 2,548 Maine Coons in the Orthopedic Foundation for Animals registry were dysplastic, and bilateral cases tended to be more severe 9. The figure describes cats whose owners chose to submit radiographs, so it should not be read as a prevalence for the breed as a whole; the authors caution against broad extrapolation 9.

Spinal muscular atrophy is rarer and more specific. Feline spinal muscular atrophy is an autosomal recessive, juvenile-onset lower motor neuron disease caused by an approximately 140-kilobase deletion that disrupts LIX1, and the pedigree in which it was characterized included Maine Coons 10. Carriers show no signs, and DNA testing lets breeders avoid producing affected kittens.

None of this makes the Maine Coon a fragile breed. It makes it a breed for which screening, honest records, and a breeder willing to discuss health are worth more than a pedigree. The cat itself is large, sociable, and slow-growing, and it asks for space, grooming, and company. The gentle giant label is not wrong. It is incomplete.