We had chicken salad sandwiches for lunch and my three-year old is a dwadler. We usually leave her food out for a few minutes, in case she wants a bit more. Apparently, Ruby decided to help herself to the sandwich and shared it with the kittens. The chicken salad is homemade with chicken, celery, onion, and pepper. The was very little onion in it, because I try to pick out my of the pieces for my daughter's sandwiches. Are they going to get sick/die from this?