Took my daughter to the pediatrician because I suspected croup..but on another note I learned she is…

Took my daughter to the pediatrician because I suspected croup..but on another note I learned she is almost 3 and only 29 pounds! Because she's also tall for her age she looks like a little skeleton. I told her doctor she is a bottomless pit of food and eats 3 solid meals plus snacks 🙄 she didn't seemed concerned about it but I feel like people think I don't feed her lol my mother in law assured me her dad was exactly like this as a child and she should feel lucky but i dunno.