My grandparents got a Chihuahua 3 years ago. Her name is Sassy, and she's the spoiled rotten queen of the house. Sadly, she HATES the new puppy. Mischa only wants to play (by goosing Sassy in the butt :\), but Sassy either runs, hides in Grandpa's lap or snarls at her. I think she actually bit her once. Is there a way to get the two to get along better?