Mercy!
How old is she? Did she just 'change' towards them? For sure you will have to keep her away from any others but maybe she should just be in a family that has only one dog. I don't see how you can change that behavior. And even if you could, I don't know how you would ever be able to have 'trust' that it won't happen again. I wouldn't risk another.
How many dogs do you have?
I am so very sorry this has happened to you and them. How very sad for all concerned.
