I have a 9 month old chihuahua-mini schnauzer mix. I've had him since he was 8 weeks old. (BTW, he is my first dog). I live in a condo and take him outside on a leash. I bought one of the dog door bells when he was about 3 months old and he took to it right away. My problem is that frequently he will ring the bell and we'll go outside and he won't go to the bathroom. He'll watch people or cars or birds or dig in the grass. I give him a few minutes and if he doesn't show any pooping or peeing signs we go back in. Then in 15-30 minutes he'll ring the bell again. Sometimes we do this 4-6 times an a row. I know if he peed or pooped just a short time (1-2 hours) ago he probably doesn't have to really go but I'm afraid not to take him out. He sleeps 8 hours at night without having to go, and sometimes 3-4 hours during the without having to go. Sometimes I think he's just bored and wants to go out. Since we're in the midst of winter and 20 degree weather I would appreciate any advice.