I dont know how people/yorkies do it... My little guy is almost 5mos old and I cant bare the thought of letting him out. I got him the end of October and he has not stepped foot on the ground outside. It is too cold here in NY. Even when I put his sweater on and bring him in the car with us he shivers for a few minutes. It is way too cold out for these tiny babies
I have been litter box training him.