MarnaLou
Did this behavior start after you returned from MINT? When I was little, we had a Black Lab who was very attached to me and my mother. My mother had to take a trip to see her sister and I was sent to stay with relatives. After we came back, the dog would attack anyone, including my best friend and her dog whom he knew well, if he perceived a threat to me or my mother. I wonder if the separation has anything to do with your pup's behavior.
