I have 2 female sibling yorkies. My oldest is 1 year and 2 months and my puppy is 6 months. They have the same mom and dad just different litters. So I am in a similar situation. They love each other so much- it was the best thing I ever did. They are the cutest, but they look nothing alike. They rarely fight, but do steal toys, but I think they love it because they chase each other and have so much fun. Ususally the older sister wins
