I got a new baby girl and she is absolutely adorable. She's about 17 weeks old and is very healthy. However she is attacking my boy yorkie who is about a year and a half old and is as sweet as can be. Sometimes it is playful but most of the time it is an unprovoked attack on poor guido. She will bite his ears so hard and he screams and I have to break it up. She also is teething which nipping and biting is to be expected, but she continues after you yelp, cry, scream NO. I've tried ignoring her or putting her in time out but it is only a very temporary solution. I need help I feel so bad for poor Guido because he gets the worst of it. He no longer sleeps in bed with me because he is afraid of getting attacked.
How do I stop this? Any feedback would be greatly appreciated.