All of my cats were severely mistreated before I rescued them. I try to brush them but they are happier when they romp and play. I just got an all black 15yo that weighed 5 lbs., riddled with arthritis a few months ago, someone let him go. He has now gained 4 lbs and is king of the roost. Can't stop the shedding but instead of declawing get a scratching board.