Most cats have 4 toes and one ‘thumb’ on each front paw and four toes on each back paw, for a total of 18 toes altogether. Some cats actually have more toes than this and it’s not as unusual as you might think. These cats are known as “polydactyls”, which literally means “many digits or fingers”.
Also known as “mitten cats” or “thumb cats”, many polydactyl cats have one extra toe on each paw, which can resemble fingers and a thumb. It’s not uncommon for polydactyl cats to have anything up to 3 extras digits. It’s more common for the front paws to be affected but it’s not that rare for the back paws to also have extra toes. The additional digit(s) can be located anywhere on the paw.
If your cat is polydactyl, you may wonder what this means for them and whether they are negatively affected by their extra digits. Here’s what you need to know about the condition!
Why It Happens
Polydactyl cats inherit the gene from a parent that also has the condition. Affected cats will therefore only develop it if at least one of their parents is also polydactyl. They will not necessarily pass on the gene to their own kittens but this is a possibility.
Is It a Problem?
Many cats with extras toes are not hindered by this at all, especially if it is not linked to another condition. Climbing is not a problem for most affected cats, and some are even better at it than their ‘normal’ counterparts.
Potential issues can sometimes stem from the positioning of the extra digits. In a small number of cases, the extra toe(s) do not form fully, which means that the nail bed is also likely to not have developed properly. This can lead to problems with ingrown and overgrown claws. You may therefore want to pay special attention to your cat’s feet and claws to make sure that this does not become a big cause for concern, and to trim their claws on a regular basis to pre-empt problem.
For some polydactyl cats, extra digits can be one aspect of a wider condition that do cause problems. This is the case if a condition such as Radial Hypoplasia is present. Here, it is not solely the extra digits that are the culprit. The radius bone is the lower front legs is abnormally short and this makes it very difficult for affected cats to walk normally. They will therefore often hop around to put less pressure on the spine.