Caring for the amputee cat
There are a number of reasons which may necessitate the removal of an animal's leg. The two most common of these are severe trauma, for example after a road traffic accident, or as management of a leg cancer.
As a general rule, cats cope far better with amputation than people imagine they will. Humans of course only have two legs, so losing one leg means a reduction to only one. Cats have four legs so losing one still leaves them with three.