Firstly, I should say I have a vet appointment this afternoon, so he will be properly looked after :)
My 7yo neutered male has been a bit quiet. We caught him in a fight with another cat last weekend, then the next day noticed his tail was not quite right. Not totally broken (we've had that with another cat), still an inch off the floor and still had feeling in it, but he won't lift it; so we assumed he had taken a knock. I have been giving him metacam, carefully monitoring his eating and toilet habits, with a deadline of today to take him to the vet if there was no improvement. Anyway last night I saw him licking under his tail, and noticed it was red raw, just at the top near his anus.
Google tells me most likely explanation would be a bite that led to an abscess. But if he was bitten in his fight on Saturday night, would that lead to his tail being sore immediately (ie from the Sunday)? I only got a brief glimpse and as he is going to the vet anyway I don't want to p him off more my poking about myself. It didn't look like a seeping wound but I didn't get a proper look. My first reaction was that he had licked it sore, rather than the wound being there originally. During the week he has been eating ok, caught a mouse (only being let out during the day and if I am here, and we are very rural so it is very rare for there to be other cats around). He can jump up on things, go up and down stairs etc and his balance isn't affected which is why the original theory of injured tail didn't worry me too much.
Anyway as I say I will know more this afternoon but just wasn't sure if the tail itself seeming sore would fit with an abscess?