M.M.
Hello! This is just a brainstorm, and it may have absolutly nothing to do with your problem. But, I noticed that you said in your "about you" that you have a 3 mo. old. Could your son possibly be acting out this way to get attention from you? I'm not saying you're ignoring your child, but when my son was born my daughter picked some naughty habits. Mistreating an animal definitly needs to be addressed, but maybe he gets enough of a reaction out of you so that you're focusing attention on him. When my daughter started her antics, I was at a total loss! She had never done things like that before, but when I made the connection between her behavior and her new sibling I made a few small changes and it worked like a charm. Sometimes bad attention is still attention. When my daughter would start on her attention getting antics, I would focus attentionon her for 10-15 minutes, we'd read a book, play a game or anything to "distract" her I guess.
She did finally grow out of this stage, and she didn't need to do as many attention grabbing things. Kids can react to a new arrival in ways we wouldn't think they would. The safe place for the cats like the other person suggested sounds like a really great idea too. Good luck with your kiddos, year 2 can be tough. Have a great day!