My 3 yr old yorkie Bitsy will at random times jump my 7 yr old male yorkie. He can just be walking through the yard and she'll come tearing around the house and grab him by the ear and just shake him. She is bigger than he is. We have another small dog in the house and she doesn't bother him at all. I don't know what to do

My husband said if she were to accidently, and God forbid, kill him when she does this that we'll have to put her to sleep

Said if she gets the taste of blood that she'll do it again..is this true?? Hope someone can help me.