Anonymous wrote:If the kid’s gait weight then please don’t say anything.
To me this is the beginning and end of the thread. If the child is going to well visits on the normal schedule, his weight is being watched closely. Babies are people, so they come in all shapes and sizes -- you don't necessarily know that a baby is underweight by looking at them. My babies were both long and were not really chunky as infants (they were chunky toddlers, then stretched out again). I had several people tell me they thought my babies were "too thin" which is such a rude thing to say to a new parent, but especially a breastfeeding mother.
But in those first few months, you go to the doctor all the time. I was also in a support group for breastfeeding moms and they had a scale at the group so I'd also weight my babies there before and after a feed just out of curiosity. Both kids gained weight exactly on track. They were growing exactly as expected with no issues, and our pediatrician never had any concerns about them. But those nosy busybodies were convinced I was depriving my babies of nutrients or something, because they had this idea of what a "healthy" infant looked like and deemed my kids too small.
Guess what, my kids are tweens now and they are still small, because being a small person runs in my family. They are also healthy, good eaters, both play sports, and sleep well.
OP doesn't know more than this baby's doctor and parents and needs to zip her lips.