My six year old cat is not well. She has been lethargic for a week or more (not playing, sleeping a lot and so on). She seems to have problems with her rear legs (strange gait, cannot jump well, problems accessing raised litter tray (can use shallow ones). She has been sick once or twice and one of her eyes seems to be more closed than the other.
She in an indoor cat, but she is from feral stock (brought up by us from being a kitten). She has had all her vaccinations, but I am worried about Felv.
We are taking her to the vets this afternoon, but I am very concerned because people have told me that if this is Felv, the vet may advise putting her to sleep.
Does this sound like something serious?