Hello. My grandfather had a 4 yr old chihuahua that he had since it was a puppy. She was house trained and had been very good for him. He passed away last spring and me and my wife volunteered to take her in. We have another dog and have always been really good with being able to train a dog...

My roommate recently got a Chihuahua from an acquaintance of his who could no longer keep her due to financial troubles. I also have a dog, a German Shepherd, but this question isn't about him. The woman he got Tosha from said that she was potty trained, but she keeps peeing and pooping in the...