HI, thanks for replying. I have a book on Yorkies, but it doesn't. say much except that they are territorial. Mia would fight another dog, She's fearless. She's like the Alpha (BOSS LADY). I just hope she's going to mellow as she gets older. When I walk her I put her harness on her so she doesn't hurt herself when she strains herself to get at another dog or person. I don't know how she got that way because I got her when she was 3 months old. She was the last pup and came from a home breeder. She was loaded with fleas, etc. Maybe she was inbred, or just neglected. I can't say. I'm not sorry I got her, she was meant to be mine. I love her and I sure am not perfect either. Anyway, Happy Holidays to you and yours, Mia and Lila6753