My wife and I just adopted a dachshund from an acquaintance. He is 3 yrs old. The pooch is an awesome dog, very sweet, and great disposition. Since he was a pup, he has been let out the back door into a fenced in yard to potty. My wife and I don't have that luxury here at our home, so he must be leash walked to "do his business"... Only he won't do number 1. He will poo in the yard, but not pee. He holds it forever, until he has a large accident in the house. Any ideas on how we can get the little guy to liberate his bladder while on leash?