white schnauzer puppy is biting my other dog

by Donna

Does anyone know of any ways to stop my mini from biting my other whippet dog. The whippet is so docile that she does not fend for herself and last night we noticed that she has bite marks on her body.

We scold the puppy but she thinks it is a joke, she is lovely, but need to stop it immediately.

Can you suggest anything?

Donna.