Hmmm, I don't know where to start. I really have had more than one. I would have to say though that the most loyal, loving and protective dog I have ever owned and loved was my Great Dane, Moose. No dog will ever come close to being as sincere as he was. He was always there for me, respected me and protected me more that any person ever could have. Anytime I was in a room he would come in and lay on the floor in front of the entry to that room, butt always facing me with his head out the door. He always put himself between me and any danger. When I would answer the door, he would try to stay between me and the other person until I gave him the okay. When I would hear scary noises, he would always walk in front of me when I went to check it out. He was just a really great dog. Unfortunatley he had very sever health problems his entire life. He had so many very serious things go wrong that I think I bonded with him more because of all the extra time I had to spend caring for him. At one point he had a very severe reaction to a medication and it caused temporary neurological damage and I had to teach him to walk again. He would have done the same for me. So I guess I can say that my dane was my "heart dog" and my pugs are my heart.