I have a 9 month old deaf Chihuahua. He's having his first experience with cold weather this week, and he's not doing well with going potty outside. He will go out and pee, but he doesn't always want to poop. He's had several accidents inside the house. He'll even go outside and then poop as soon as we get back in the house. He hasn't been the easiest to potty train and still has accidents anyway, but it's been really bad since it got cold. Does anyone have any tips? We've also had issues with him not letting us know when he needs to go out. Any tips on that too?