I have a 3 year old adopted 4 months ago that the last few days will not eat. I have made homemade food (which she liked) lamb, rice, veggies, apple. Flaxseed but now she doesn't want anything I give her. She ate some grass awhile ago but seems relestless. She did eat a salt and vinegar chip the other day when a guest dropped it on the floor. Would this have anything to do with her upset stomach