I have two male cats that are a litte over a year old. Has anyone heard of cats have mulitpule (sp?) kittyhoods? I think my boys are going throw another one. They haven't been this active since they were about three months old. I know this can happen with dogs but I have never heard it about cats. The boys spend all night running all over my house chasing each other. Its really funny to watch untill they start using us as springboards. It's a little hard to sleep through that.