My son, now 24, went undiagnosed until 2.5 yo. He did not gain weight for a year (this is a lot for a little baby). His height prediction was 5'7" yet he is almost 6' now. His pediatrician did tell us that growth stunting typically makes up for itself in puberty (and it did for him). That said, he was a different age than your daughter and I would think if...