Stormy is 6 months old. We have had him just over a week. He was neutered last week. He is the fourth cat for us. Things have been fine. Everyone adjusting to the new addition. Today Stormy decided to start sleeping in the litterbox. He has not done this before and I have taken him out of it 6 times and he still keeps going back in. It is not an enclosed box. Please help with advice as to how to break this habit and suggestions as to why it started. Thanks.