[Sundae]

Not always using his litter tray even when spotless. For either.
Chewing cardboard/ paper/ cables.
Shouting loudly at the walls For milk, or sometimes at insects out of reach, or sometimes for no reason at all.
He's stopped biting now, but he still like to play kamikaze death cat, where he can claw for no reason.
Needing to have his nails trimmed.
Stealing food.
Wanting constant attention and warmth.

All of the above will be exacerbated by leaving the only person he's had a one on one relationship with. His breeder must have had over 20 cats, but he was still distressed when he left. But he's been with me eight years now, and even the years spent living with Mum barely touched his devotion to me. If I was in the room she may as well have been a worming tablet.