My DD was always on alimentum because she had this massive constipation/ digestion issue with regular formula. It was never tested because alimentum worked and we figured she would outgrow it

She is almost 10 months, i decided to give a try to milk based, and i started giving her real yogurt over yougurt melts.

REal yogurt made her poop harder and dryer.

THen 1 whole day without alimentum and just on milk based and the next day it was psychotic constipated crazy baby that i remember from b4 we started alimentum.

Does anyone know if this is an allergy reaction or a lactose reaction?

RIght now we are just doing prune juice and liquids until she goes normally and alimentum, no solids or anything else.

My concern is that i dont want to experiment and torture my child to figure this out. Does anyone know if there is testing for milk intolerance /allergy?