My daughter is tiny (47 inches, 45 lbs., age 9). She has had all of the growth testing done at the request of the pediatrician and they told me that she is normal, just small. I know that she eats enough for an average child, but I am growing concerned about the amount she eats based on all of the physical exercise that she is getting (trains 5 days a week, 3 hrs.). Does anyone out there use protein supplements for their child? I have heard that it can sometimes be damaging to the kidneys/liver to get too much protein. What does everyone think?