I thought I should commemorate the bicentenary of the birth of Charles Darwin, so let me introduce you to our Polly aka the Pollypod, an evolution case study.
Look closely and you will see that Polly is a polydactyl or a "mitten cat". It's all due to a gene mutation. Most polydactyls make good use of their extra dexterity and I've seen Polly very gingerly extract food from places that other cats can't reach. (Alas, I have not seen her knit.) She should really be top cat, but she isn't. She is shy and nervous, probably from being treated cruelly before she was rescued by Celia Haddon.
Poor Pollypod. At least she has her mittens and the other two have lost theirs.