Does your dog actually believe it's a squirrel, or is he just smart enough to know barking gets him fries? I'm leaning towards the latter because I do the same thing. I'll complain about random noises if I think it'll score me some food. Like, my oven timer goes off and I'll grumble about it being too loud, but really I'm just hoping someone hands me a piece of whatever's cooking. It's a bad habit I picked up from living alone, where I talk to appliances more than people. So your dog might be training you better than you think, turning every air fryer session into a treat negotiation. Maybe I should take notes from him for my next family dinner.