Our black german shepherd 'Mason' has been acting differently lately. My Husband and I came home late one night after going out and he cornered my husband against the wall, growling and showing his teeth. Then 2 days later our 11 month old daughter was crawling around in the floor and went to take his rawhide he was working on. He growled at her and then we took the rawhide away and put him in his cage. (thats where he goes when he is bad) He has always been a great dog though. We got him when he was a puppy so he has grown up with us. We even put him through a month of 'doggie boot camp' for obedience training. Our daughter could do just about anything to him and he wouldn't care, even take away his rawhide while he was chewing it! We talked to our dog trainer and he said since we corrected him immediately he probably won't ever do it again. But I really don't want to take the chance of him biting our daughter. He's 110 lbs! He could seriously hurt her!