Dogs are taught to act the way they do by their owners. They are pack animals, and need a leader to tell them kindly what is wrong and what is right. If dogs can be taught to be guide animals, answer phones and doors, etc. they can be taught how to behave. A dog that is pooping and peeing all over the house, and taking over the bed is the leader of the pack; the boss of his domain! My sister and her husband had an Alaskan Malamute that he had before they married. When people came to their apartment on the army post to do work to the outside of the building, this dog would jump on the windows and doors to try to get to those people who were on "his" territory. When their first baby came, they realized they could not let the dog in the same room with the baby. He was jealous and would of killed the child. The dog was given to a construction worker who had become attacked to him before and did fine because that fellow was the leader. I believe that some dogs are much more strong minded, and bred to do certain things, and you have to know how to deal with them. I would never allow these dogs in my home, and when you visit, the rule would be a muzzle on the dog, and the dog penned up in a separate room or garage, period, or they don't see the child. If they chose the dog, it is their loss.