I've been mix feeding (supplementing at the end of a BF session in order to settle bubs) for nearly 3 weeks now. I started using the ready made formula by Aptimel (1) which bubs chugged down no problems.
About a week ago I realised it was going to take quite a lot longer than a few weeks to sort out my supply problem so we moved from ready-made to powdered Aptimel.
Probably about a week ago as well, bubs started to get increasingly difficult to settle. The last few days, he seemed to be straining and crying before he had a poo or fart. His poos containing solids - which I understand is formula poos - seemed less frequent and what he did pass was mustardy paste like (presumably breast milk). He seemed also to need carrying a lot more than previously. Another mum at BF Cafe suggested Infacol which I have since cracked open and he has since passed a lot of wind and has been settling like he used to.
Is it possible that the powdered formula somehow give bubs more wind? I presume the recipe for both the ready-made stuff is the same as the powder stuff so presumably this isn't a problem with the brand of formula not agreeing with him?
Or perhaps it is the breastmilk that is causing the wind? Sorry if this has been asked before, I did try looking it up but I have limited time before he wakes up screaming again...