Diane......... if Sophie is really active, she might just be running it off. I am sure, she will have a few more growth spurts before she is done growing! I know how you feel. It was a shock when Tatiana had not even put on an ounce in little over a week! MY vet told me the same thing....if they are eating, peeing and pooing and active, they are fine! As "Moms" we always worry!