Girls, we gained 1550 in a month and that's great ? but everyone aroun…

Girls, we gained 1550 in a month and that's great ? but everyone around us: husband, mom, sister, rarely, but they will say he is skinny and not plump. Truthfully, he's not really skinny, but his legs and hands aren't chubby, cheeks are huge though ? I don't care, it's loose, because not all babies are plump) Mom herself says I wasn't plump either, but she hints that there's little fat in milk. Is it right that if we needed milk, it would be thicker for the baby? We also sometimes drink formula.