We have had four cats since 1997 - not the same four, but I have this thing about odd numbers! The first bunch of four got along extremely well, and when the older two crossed the Rainbow Bridge (at different times) we adopted a brother and sister, and the new bunch of four got along well, too. Then the brother of the "dynamic duo" as I called them, died extremely prematurely and very unexpectedly of liver failure. After nearly a year we adopted a new family member, and it has been pandemonium ever since. He wants to play with everyone, and everybody else just wants him to stay out of their faces. Lots of cat chases, hissing, spitting and yowling, but no physical attacking, thank goodness. I keep thinking Sonny will settle down as he gets older and matures, but I think I have a perennial "kitten".