My naughty girl had a fight with a neighbour's cat the night before last and is feeling rather sorry for herself. We've kept her in so we can keep an eye on her, which she's not very happy about! She's got some scratches on her front paws, which were bleeding when she came back in but seem to be mending now. I'm more worried about her bottom lip though, which looked like it had split when she came home. Today it looks red and sore, almost blister-like. I've tried to take a photo when she was asleep, but it's not the best (or the prettiest)! Should I leave it to clear up on its own or does it need a trip to the vet for some antibiotics and/or treatment?