Mario is new to the area and hasn't socialised a great deal with dogs here. Previously he lived in a rural area and did not have had the opportunity to mix much with other dogs. He was one of 2 dogs at home and was always bossed by the older females we had had. He is generally very friendly with humans but would be inclined to dislike some smaller dog breeds. Health wise he is fine. His previous dog walker did not have any complaints about him.