So sick of her! ๐Ÿ˜‘๐Ÿ˜’

My friend just text me and is going off on a rant about how our other friends baby is almost 6 months old and is still in new borns. Is this actually something to worry about? I am almost positive that the baby is perfectly healthy and just small. His mom is a really good mom. It's not my friends place to judge anyway, but I was just wondering if you would also be judging/concerned? His momma it's tiny!! She is very petite and had him when she was 17-18. She is very short and skinny. He is 100% healthy though.