Baby’s low weight

Anyone else’s baby on the lower side of the curve?

Mine is about 50% on length and head circumference, but from 4 months to 6 months, he dropped off his 12% curve and down to the 4% curve. Pediatrician didn’t seem worried since he was getting plenty of milk and eating solids twice a day on top of that. She thinks it’s cause he’s active.

I don’t think too much of it until I see other babies. Baby boy is just over 32 weeks, and weighs 15.5 lbs. That may be generously speaking.

But today, while he was sleeping, I feel like I felt the bottom of his rib care a little too well.

Anyone have a string bean?