Ok, thank you. I don't think it's non-recognition aggression though, since neither of them has been away from the home? (but I am reading it and looking at the techniques anyway)
I'm sure similar questions have been asked before but I don't have time to wade through the thousands of threads. :)
Our two cats, Alan and Tiger, are between 2 and 3 years old. We've had them for a couple of years and until about a month ago, they were best buds. We adopted them as a bonded...