Wow Jess! I can't believe he said that!
We have a somewhat similar situation with my neice. She is 5, will be 6 this summer, and yes, she has more than just baby fat though... Apparently she weighs like 65 lbs and the doctor put her on a diet!
Now, my own daughter was a chunky monkey when she was an infant through 3 years old. My doctor made sure I wasn't feeding her junk, and when he was satisfied with that, then he said she will grow into when she starts walking, running, jumping and being the little monkey that she is.
And that is exactly what happened!
Unfortunately with my neice, I know she is eating junk and drinking too much juice. I tried to warn my brother that she wasn't getting enough physical activity and eating too much junk (he would give her two full bowls of cereal in the monring, for example!) but you know how reactive you can be when someone tells you something like that.
But for your little girl's grandfather to say something like that? Pfftt... that's uncalled for. I'm sorry he said that.. and I'm sure she won't notice it. My neice didn't start noticing her weight until she was 5. And even then, the seed had been planted because her mom tells her if she gets fat she can't play.
People are stupid.
LR