Hi. I feel your pain and I can't find much help either. I have a female Yorkie and a female Maltese and lately they have been having some fighting issues too. Actually, they get along great except for when the doorbell rings, then Bella barks and Harley tries to stop her by biting the back of Bella's neck. I really don't know what to do either. I did write both of their breeder's and if I get any useful info I'll pass it on
