Are the dogs fixed? that will help if they are not.
Minnie Mee has only taken a dislike to one dog, a Parisian Bulldog, and she snaps and bites and barks and snarls at him. Fortunately he is easy going and doesn't care. But your two dogs live together, so this is urgent.
Have you been working on Bite Inhibition with Alice? At least then, she will know not to hurt your Chihuahua. It must be a territorial thing. Do you have a sound to show her you are unhappy? I have a Tsst sound that tells MM that her behaviour is inappropriate. She always stops her actions when I make that sound (she may start again in 5 minutes, but then I doubly Tsst her.) Then I have a tut tut sound to show her that now she is behaving appropriately. Dogs can't speak English, so she may be interpreting your anger and speaking as encouragement. If there are two distinct sounds, one that means good and one that means bad, then she knows.
I also suggest you go to a professional dog trainer with the two of them. This sounds like it needs to be nipped in the bud immediately.