My cat is now about 6 months old, and while he is still playful a lot of his playfulness has taken an aggressive turn. He use to like to chase balls and pounce on his cat nip mousehe now attacks us. It is usually completely unprovoked. For example yesterday I was at my desk talking on the phone when he snuck up behind me and jumped up on my leg and sank his teeth into my thigh! We keep his claws trimmed and he has had all his shots and has been neutered. .Im wondering if now that the kids are back in school and Im gone most of the day if he is getting lonely? Would getting a second cat help give him some companionship during the day?