Yep, I've used a chiro for both DS2 and DS3 when they were 5 weeks (he stopped bf'ing on one side) and 3 weeks (wind/colic/very unsettled) respectively. It's not instant magic, but I did find a vast improvement with both babies from the first visit. Ultimately I found that after a series of adjustments all the issues I'd had disappeared. I think taking bub to a chiro is a great move. I still take DS3 for monthly adjustments as he's had some ongoing minor gut issues which I find is helped by visiting the chiro.