I took both my kids to an osteo in the first few weeks/months after birth and they had small adjustments. It did not make a big difference to their colic/reflux/unsettledness, but i was happy to try it and to repair any 'damage' from being born.

I also had chiro during my pregnancy to help with sciatica and to give DS best opportunity to turn head down. They used an activator during these treatments.