I know this is not a rare problem, but any advice you can give me would be greatly appreciated! One of my cats has been to the vets many times over the last week and has to go in for a surgery today or tomorrow. The vet told me to keep him seperated from my other cat, as they may not get along. This had never been a problem before, but this time, my female cat will have nothing to do with the male cat who has been to the vets. I am keeping them separated, but if they do see each other, she hisses at him and gets very aggressive. I just want to know how long this generally goes on, as I would like to have them both be able to roam the house again together soon! Has anyone else experienced this...and how long does it go on? Are there ways that I can "encourage" them to "make up" without making it worse??