That is interesting about the Feline Aggression. One vet has told me that Ripley suffers from Feline Rage. I got him at 7 weeks old so I don't know if this might be the cause but if it was then I can tell you that he should have stayed with him mom for a whole year. His "rage" has really wounded me at times. It was so bad that my vet wanted to put him on female hormones. This was 12 years ago before there were so many mood altering drugs available for pets.