Help! Shrinking Child Syndrome!

So, the thought came to me recently that maybe I should compare some pictures to see whether our dog, Toby, is growing at a healthy rate. So I found a photo of him at three months and then took a new one today at six months. I put them together and now I have a slight problem. Unfortunately I can't really see a difference in the dog's size. Quite alarming though, is the fact that my daughter seems to be rapidly shrinking. Do you think I should seek medical attention in this scenario?Please respond promptly with any advice you can share. Thank you.