Hello. My 4 year old has always been the best boy when I’m not home. Never a problem. But lately, I’ve had to spend more nights away and he’s by himself. After a couple days, he will express his frustration very specifically. He has started to chew a few things up, but only things he’s seen me use and never anything expensive. It’s funny how he chooses but not acceptable. So what, if anything that isn’t just a chew toy, has proven effective. He owns stock in bones lol. I’ve looked at a treat dispenser with a camera and voice. He’s has treat puzzles that he solves stupidly fast. So, just curious. Thanks.