The other day Jeremy jumped up on to my lap and had some ink stuck on the side of his head. When I tried to get a closer look he growled and then bit me quite hard. I growled at him and told him to stay still as I wasnt hurting him. He proceeded to chuck a full on tantrum,just like my 18 month old baby does, but I didnt let him go until he had settled down again. He also tried this on when I put his harness on and now he is going my children as well. He hasnt been teased at all and he is not in pain anywhere. I have a feeling he is testing his boundaries and seeing how far he will get. He is 15 weeks old. I didnt think he would be old enough yet. Anyone have any suggestions on what I can do? I am quite saddened by it as I thought they were great dogs for kids.