I'm wondering if it's that chair or style of chair particularly that she doesn't like. Or if it's the separation from you that having a tray in the front of her forces that bothers her. One thing we were taught as adoptive parents is to have a lot of eye contact and interaction at mealtime. Perhaps that would ease her separation anxiety, if that's at the heart of it. If it's the chair, I switched my daughter around between two different ones for a while (a smaller, portable model, and her higher, full high chair. Then a little later on, when she no longer needed a tray, we bought her a pretty wooden chair (we found it used, for only $20, at a church sale), a miniature of ours, which she used until she past toddlerhood.