I had a bog ol' tomcat a long time ago who was alwasy getting in fights. We would clean his wounds and then put an antibiotic crema (like Bacitracin or a generic triple antibiotic ointment) on it. He would usually lick it off if he could reach it, but our vet told us that was fine, at least the antibiotic was getting in his system. The vet told us it was ok to do this, as unless the cat needed stitches, that's all he would have most likely done. Saved us a lot of money and our cat did heal without getting any infections.