I can't believe it! It sounds just like my house. I have a 4 1/2 year old schnauzer, Hans. Our boxer passed away May 7th. They got along perfectly because the boxer was so calm and submissive. Last Saturday we picked up Fritz, a 3 month old mini poodle. The first couple of days Hans wanted nothing to do with him. Fritz would persist though. Each day gets better and better. They even play together now. When Hans has had enough he lets Fritz know. Hans also disciplines him. He'll pin Fritz on the ground with his paw when he wants him to calm down. It's kind of neat to see. As for the potty training, PATIENCE! He'll catch on eventually. It took 6 months for me to train the boxer. Fritz is catching on slowly but surely. Don't give up on the new dog yet. Dogs are pack animals and I'm sure they'll grow to love each other.