HUGE pot belly on toddler

Ava, who is 21 months old, has a HUGE rock hard belly. DP would mention it off and on, but it wasn't until Plunket said "oh i dont think she has an enlarged liver" that I thought there may be something wrong. She has a healthy appetite and weighs 11kg (height 80cm) so is not a huge toddler (except for the stomach!). I remember having a bit of a pot belly as a child.

Is it normal????

Dan has a BIG belly but is pretty small everywhere else. His tummy is only rock hard after eating though. If it's always rock hard, then I'd check with the GP, but if it's just a podgy pot belly, I wouldn't worry.

I asked my GP and she just asked if anyone in the family had celiac disease but no-one does...

My wee girl (16 mths) is tall and athletic, except for her tummy which looks like a little 'beer belly'.  I was worried because it looked out of proportion, but in our case Plunket said it was OK.  I remember having a pot tummy as a kid.