Most importantly, do you trust your doctor? Where is she on the growth chart? Is she starting to fall off, for her weight/height? Remember, baby diets are high in fat, until a child is two years old you want them to have a high fat diet in order to help brain growth. Just because your baby isn't chubby isnt' a problem, but seems to me this couldn't hurt your baby. Congrats on your baby, and your petite little one. I live near Brownsburg, in your neck of the woods.