N.C.
Dear A.,
After my daughter spent almost a week at my parents house while we were on vacation, we had a similar experience. What I came up with that really worked well was take a pakage of m & m's and after every BIG bite of 'real' food she would get one m & m. After she got used to that we increased the big bites to two or three. You could switch it around to whatever candy you chose. Now, she only gets a 'yummy' after she eats a good meal. I hope that helps. Good luck, and I think you are doing a wonderful thing by being a foster mom, props to you!
N. C