Hello everyone! Girls, my child has been having diarrhea 4-3 times a d…

Hello everyone! Girls, my child has been having diarrhea 4-3 times a day lately. It used to be every other day or daily. We're 7 months old (not a non-corrected age of 5 months). We recently changed his porridge to fructo nanny. 2-3 times a day. I feed him, offer him constantly. Can't force him to eat all the time. Don't know what to do. Has anyone experienced this?