Hi all, I'm new here but badly need some advice for my misbehaving kitty! I've got a 3.5 year old black cat who is generally well mannered, loves attention and is constantly fishing for attention and a tickle on the cheeks, but he goes absolutely mental when his litter is being changed/has been changed, to the point where he chases to bite and scratch anyone who passes, including me of course. Right now he's on house arrest (locked out of the rooms we are in) after just attacking my partner walking around the house - we had to lock the cat in one room and me in another where I changed the litter to stop him going mad at me but it was no use... as soon as we let him out and walked out he went mad. Any idea how to stop the cat from doing this? At first locking him out of the kitchen whilst I changed the litter helped but clearly not this time - but he can't carry on doing this as each time he is drawing a lot of blood and it's not acceptable.