I have not had a dog in over 15 years. My wife found a lost chihuahua, 4lb 11oz, male, not fixed (yet). We have had him about 3 weeks now, he is oficially our per animal control since we were unable to find his owners. He is having house training issues. We can't seem to get him on a schedule. we take him outside at regular scheduled intervals, tell him to "go potty". we praise and pet him when he does it. He does not let us know when he needs to go out. He does not pee in the house as far as we can tell, but his pee schedule is random/hit or miss. He poops in the house, usually goes and hides, or does it at night. We can't seem to catch him in the act to train him. He is also overly submissive and wont listen. tail between his legs, roll over on his back and presents his stomach every time you pet him. I just tried to take him outside, he knows "come" but he wouldnt do it. I went to get him and he tried to run off, tail between his legs. I caught him and picked him up to take him out, not huring him at all, and he started yelping like he was being murdered. I set him by the door gently and told him "come" again and he came out, i praised and petted him for obeying. After I got him outside in the grass and all he would do was lay on his back in the grass. He peed on me while he was laying in his back. I tried to turn him over and told him to "go potty" and all i got was the "I'm being murdered" yelping even though I was not hurting him... incredibly frustrated, more than a little angry, had to put him in his kennel, please help!