Mention it when u get her weighed/get injections or even just take her docs. Now hun if you and others feel that she definitely has a crick in her neck, but docs don't do anything, then take her to a chiropractor privately. My SILs little girl had a very prominently crooked neck and everyone could see it, but the doctors wouldn't do anything, they went many many times, eventually she went private and just a few sessions and her neck was fine. Just make sure to go docs first and ask others too if they think it's normal, because ofc as mums sometimes we are a bit over worried xx

If your worried take her the doctors to put your mind at rest, I'm sure it's nothing to worry about though x