Extra Toes

Polydactyly (Variant 2)

Alternative Names: Polydactylism, Polyphenism

Polydactyly (Variant 2) Photo

Polydactyly (Variant 2) may result in extra toes on all four feet.

More Info

Did you know?

Polydactyl cats are known to some as “ship cats” as the additional toes were thought to give them better balance when out on stormy waters. Some sailors even believed the extra-toed felines brought good luck when out at sea. The cats with this rare variant are traditionally found in South West England and Wales (United Kingdom).

How it works

One or two copies of this Polydactyly variant may result in a cat having extra toes on all four feet. About half of the cats with one copy of this variant will have extra toes. Cats with two copies of this variant are even more likely to have extra toes.

Health implications

Most polydactyl cats do not need special care apart from regular nail trimming as the nails can become ingrown, triggering pain and infection.

Prevalence

1 in 2,500 cats

has one or more copy of this genetic variant in our testing.

Technical Details

Gene LIMBR1
Variant C>G
Chromosome A2
Coordinate 169,533,066

All coordinates reference FelCat9.0

References & Credit

Credit to our scientific colleagues:

Lettice, L. A., Hill, A. E., Devenney, P. S., & Hill, R. E. (2008). Point mutations in a distant sonic hedgehog cis-regulator generate a variable regulatory output responsible for preaxial polydactyly. Human Molecular Genetics, 17(7), 978–985. View the article

Hamelin, A., Begon, D., Conchou, F., Fusellier, M., & Abitbol, M. (2017). Clinical characterisation of polydactyly in Maine Coon cats. Journal of Feline Medicine and Surgery, 19(4), 382–393. View the article