My 9-year-old miniature schnauzer came from an abusive puppy mill about 1 1/2 years ago. He has been with me ever since. He was never potty trained and wears a diaper. My major concern is a warm and loving personality who connects with him who can feed him twice a day and change his diaper and put him out in the yard to go potty. He is doing very well going potty outside now but I've never been away before and I don't know how he will react. He is a sweetheart but he does bark at strangers. He need to go out every 2 1/2 to 3 hours. My son will be home most of the time but wont let him near him. He is. afraid of men. Can you help me?