Only eaten twice in a week?!?!
Please get some 'human" food (or a high quality dog food) and MAKE her eat.
I would probably get chicken and cut the fat off (my favorite is the white meat). Then I would boil it with no seasonings. Then add something to it (brown rice, wheat pasta....anything) and put some veggies in it and about a teaspoon of olive or canola oil and make her eat.
I'm sure steak would be fine too or canned food but she has to have something.