My 8 month old puppy is dominate over my 7 year old dog. My 7 year old dog will not stick up for herself. She just lets the puppy pull on her neck, bite at her feet, and stand over her. I stand between them and make sure the puppy knows I do not like this behavior. I try and make her lay down in a submissive position, but every day she continues. This has been going on for a while. Does anyone else know what else I could do to make the puppy stop and respect her more?