Last night my grandma woke me up at midnight and found a little puppy on our front steps. We decided to keep her and her new name is Bella. She’s about 10 inches tall and probably less than 10 pounds. We think she is 2-4 months old. My grandma has a 7 year old Rat Terrier, Cricket. I have an almost 2 year old Australian Shepherd, Sheila. Sheila is almost 2 1/2 feet at her shoulder and around 60 pounds. I need some tips on introducing Bella and Sheila so Bella doesn’t get hurt.