We saw a long term osteo of my partners for our lad at 3-4 months for his torticolis and flat spot after a breech caesar.

Its important to know that pedi oseos are far gentler on bubs than they ever would be on adults, so they seem to not being doing anything in front of you.
Ours has trained with children in the UK and well versed in pedi care.

Don't e fooled though with exhorbitant prices charged by some out there claiming to be pedi osteos and physios.