It might be the dog food she does not like but most likely it is because she trained you what to feed her. A strictly people food diet (unless researched and done properly) can be very un- nutritious & very un healthy for her. I suggest you look into natural meals for dogs (like the B.A.R.F diet) & switch her to that or make her eat dog food. Get a really good dog food (inova, nutro, canidea etc..) and feed only that or try adding bologna & steak to it & gradually add less & less people food to her dog food. If a dog is completely healthy & drinks regularly it can easily live 3-7 days with no food. I know it is very hard to look at those sad eyes but be firm & do not give in. Talk with your vet or a trainer/behavorist about this. Feeding only bologna & steak is not the proper nutrients that a dog needs to live healthy. It can cause many health problems. At least look into a supplement to add and maybe hard bones to help the teeth a little. Good luck.