i have 2 dogs, both girls. one is a 2 1/2 yr old wire haired terrier/daucshund/mini schnauzer mix, and the other is a 4 month old peikenese/wire haired terrier/english springer spaniel mix. the 4 month old is already way bigger than her 2 yr old companion, and she knows it. she can fit the smaller dog’s head in her mouth, hence the problem. she doesn’t try n bite hard, but every time we let them in the house, she does it, even if they were outside together. is she trying to display dominance, and is there any way to stop her from doing it? my older dog is getting sores from where she’s been biting her.