This is the first time I have been at this site but I have a question.

I am hoping for some help. I have a female Yorkie that is 2 yrs. old and a Maltese female that is also 2. The Yorkie attacked my Maltese for no reason. She bit her and would not let go. My Maltese had to have minor surgery on her leg and stitches for the bite wound. It was very deep. I cannot figure out what or why that would have happened. Is this common in Yorkies? Please help! Jackief