Ohhhh! I just remembered how the vet told me to become the alpha in the relationship, and this is how they also test to tell if the dog is submissive. Lay the dog on its back and hold it down gently. This is how dominance is created in the pack. If the dog just lays there relaxed then it is the submissive one. If it struggles then it is trying to be dominate. They had me do this with Layla when she was trying to be the alpha with me. It really helped. I hope I've been some help!