Weird. My boy Xander had a lame leg we had to have amputated. And a stray cat has shown up outside missing one back foot! She sort of hobbles on it. We don't feel we can take her in now since we already have 4 cats and a dog, but I think she is planning to stick around, so I guess we'll be taking her to the vet to get fixed soon. She's only missing the one foot, and she hobbles on it when walking but lifts it when she runs. I don't know how your kitten will do. Have you seen him walk?