She is a puppy, and a JRT mix at that. JRTs have extreme energy levels.

Any 10 weeks old puppy left to her own devices is going to run on a rampage.

I would suggest a couple simple searches on:

Crate Training
House Training
Bite Inhibition

And they need to get her in puppy class.

It is not difficult to properly raise, redirect, and modify the behavior of puppies, but one must have the tools and the know how to do it.