Difficult to train??? He sits for his food and has no problem with me taking it away from him. We counted one time, and he knows at least 30 words, including Mommy and Daddy. Aggressive?? Mine's best friend is a cat. His other best friend is his live in companion who is an ms/border terrier cross. He barks when he is defending his home, but that's part of his 'job'. He doesn't need to be brushed three times a week. He goes to the groomers (make sure you don't use a store groomer) every 6 weeks and is fine the rest of the time. If he asks for something and I don't want to give it to him right then he wanders off (in a fake huff lol) then takes a nap. This is the most mis-informed presentation I've ever seen on Minis!