You hit the right spots. It's important for parents to observe their children's growth rate and also monitor development and cry out when they see anything that doesn't add up.
Parents are usually the first to notice these things and if they overlook it, the complications might be worse than when earlier detect.
You have just armed them with the tools they need to be watchful.
God bless you.
Bless you too dear friend, parenting is a lot of work and we need to be very observant about even the tiny details.