Manx

About the breed

The Manx cat is one of the most recognizable breeds in the world — mainly because of its distinctive taillessness. Its rounded silhouette, often compared to "a bowling ball with fur," comes from hind legs noticeably longer than the front legs, giving the cat a bouncing, almost rabbit-like gait. Behind this unusual look lies far more than a curiosity: the gene responsible for taillessness is one of the best-documented examples of a lethal gene in domestic cats, which makes understanding the breed's background essential for any prospective owner.

Origin on the Isle of Man

The breed originates from the Isle of Man in the Irish Sea, where, according to the Cat Fanciers' Association (CFA), it has existed for at least two to three hundred years, with the earliest records dating back to 1810. Because the island was geographically isolated, a naturally occurring mutation causing a short or absent tail was able to spread through the local shorthair cat population without being diluted by mainland cats' genes. The Manx was among the first pedigreed cats ever exhibited — first shown in London in 1885 — and was one of the founding breeds when CFA began formally registering cats in 1906.

Legend and reality behind the missing tail

Several folk stories circulate about the origin of the Manx's taillessness, the best known being that the cat boarded Noah's Ark last and had its tail shut in the closing door. CFA's own breed page explicitly calls this a "charming story" — a legend, not a fact — and explains that taillessness is far more likely the result of a natural mutation that arose within the island's native shorthair cat population and then spread further. Similar legends blame Vikings or crossbreeding with rabbits, but in every case these are folklore, not science.

The genetics of taillessness — a dominant, lethal gene

Taillessness in the Manx is caused by an autosomal dominant gene, usually labeled M. Every living Manx cat is heterozygous (Mm) — carrying one copy of the mutant gene and one normal copy. When a kitten inherits two copies of the mutation (MM), which can happen when two tailless cats are bred together, the resulting embryo does not survive and is lost early in pregnancy — making the gene lethal in its homozygous form. This fact, documented among others by the UK animal-welfare science organization UFAW (Science for Animal Welfare), is why responsible breeders never mate two completely tailless cats with each other.

Manx Syndrome

The same gene that shortens or removes the tail can also affect the development of the lower spine and spinal cord — a group of problems veterinarians call sacrocaudal dysgenesis, and which owners know as Manx Syndrome. Affected cats can show spina-bifida-like abnormalities, including hind-limb weakness and a hopping gait, loss of sensation in the hind legs and around the tail area, difficulty controlling urination and defecation, recurrent urinary tract infections or constipation, and in severe cases paralysis. According to UFAW, one study found that around 16% of kittens were affected, and all of them were completely tailless (rumpy) cats. There is no cure for Manx Syndrome; management focuses on hygiene, bladder expression where needed, and adapted living arrangements — mildly affected cats can live long, good-quality lives, while more severely affected cats may require intensive care or euthanasia.

From rumpy to longy — the range of tail lengths

Because the mutation is expressed to varying degrees, Manx cats fall into four basic tail categories: rumpy (completely tailless, often with a small hollow), rumpy riser (a small rise formed by one or two fused vertebrae), stumpy (a short, often kinked partial tail), and longy (a nearly or fully normal-length tail). Under the CFA standard, only completely tailless cats — or those with a minimal rumpy-riser bump — may compete in the show ring. Because the hind legs are longer and more powerfully built than the front legs, the cat has a distinctively rounded body with the rump higher than the shoulders, producing its recognizable, slightly bouncing, rabbit-like gait.

Shorthair and longhair varieties

The Manx comes in both shorthaired and longhaired varieties; the longhaired version is often called the Cymric, especially by North American associations such as CFA, where it is treated as a coat-length variety of the same breed rather than a separate one. Both varieties have a dense undercoat and a somewhat water-resistant outer coat, and kittens of different coat lengths can appear in the same litter. Grooming needs are moderate — weekly brushing is usually enough, with more frequent brushing during heavier shedding periods.

Temperament, family life, and everyday care

Manx cats are considered playful, curious, and intelligent, and are often described as "dog-like" in their loyalty — they enjoy following their owner around the house, can learn to fetch, and bond closely with every member of the family. They are friendly toward children and generally get along well with other pets, making them well suited to families and apartment living, provided they get enough opportunities to play and climb. However, because of the breed's genetic complexity and the possibility of Manx Syndrome, they are not the best choice for a completely inexperienced owner — anyone considering a Manx should look for a reputable breeder who does not mate two completely tailless cats, and should be prepared for regular veterinary check-ups throughout the cat's life.

Pros & cons