We are fostering a dog (2 years old) at the moment. He has been with us for 2 weeks now. We were told he was very good with children. It was obvious when we got him that he has had little to no training. That is fine and we are working on that. However yesterday he growled at my 4 year old dd when she took her teddy back off him. My back was turned so I don’t know if he also snapped. This morning my 4 year old was poking my husband in the hand to get his attention and the dog who was sitting on the other side of my husband jumped over him to growl and snap at my daughter as if he was protecting my husband. This has freaked me out as I know this is possessive aggression. What would you do?