This is more of a household problem rather than a behaviour problem, but I require some help and maybe it's possible you have good ideas. Lately my dog has been very stressed. Not only him, but me too. Remember that I got a kitty? Said kitty has turned into a destructive force, and my dog has taken up the task of correcting him every time he is doing something wrong. You can't leave Holden (the cat) alone, or he'll break something. Yesterday I woke up 3 times in the night, twice because he had spilled all the contents of the garbage can in the floor, once because he threw a chair to the floor. Now, this wouldn't be much of a problem (although I hope he stops doing that when he grows up), but my dog is really stressed about the cat. He was never a reactive dog, but now he's started to be dog reactive. He has also started to be overly protective of me. And all this started when the cat came home. Every time the cat does something "wrong" (such as spilling garbage can contents, stealing food, or attacking people) he goes over and corrects him just like a mother dog would correct a puppy. I've thought of maybe locking Holden in a room and leaving Winston in another one while we're gone. Which is a shame, really, since I wanted a cat so he could play with someone when he's alone. But what would a hyperactive cat do, 8 hours in a room? Play on his own? I don't think it would be good either. Usually when we're home there isn't much of a problem, because we distract him a lot, but the problem is usually at night or when we're sleeping. I can't get a second cat, and I don't want to give him up for adoption or anything like that. What can I do to lower my dog's stress? I need some clever ideas.