Thanks for the helpful replies everyone! They seem to be doing a little better today... still hissing whenever they see each other, but no fights. I've been trying to make sure they sleep in separate places but I alternate where they sleep, so they each have to sleep in a room with the other cat's scent. I'll try the butter and vanilla extract too, hopefully that will help them recognize each other better.
Last edited by Sixshot; January 15th, 2009 at 02:57 PM.