Wow, thanks. The only problem is she is living with her parents right now and they have two Shih-Tzu's. One of the major problems she was having was that her family would feed her all kinds of crap. They felt bad to give the "boys" a treat and not give Tessa one. And they feed their dogs anything and everything. My friend would get SOOO angry with them.
Last week at the vets office we were discussing all of this (and my friends mom was there). I mentioned that you (meaning my friend and others in the house) need to stand strong. Because she knows if she wants something someone will eventually cave in and give it to her. My friends mom said "like me". And I said "yeah Denise!!!" So hopefully with her being there and hearing the vet herself she will help keep Tessa's diet strict. Her father may be another story though. She knows she just needs to get out of there, but it's not possible right now.

So I will just tell her she needs to feed Tessa away from the boys and give the boys treats when she is not around. Simple as that. This is Tessa's comfort and possibly her life we are talking about here.

Thanks Orangutango, I will give her these ideas as well.