Hi,my 2 Year Old Was On S26 Progress3,but Was Always

hi,my 2 year old was on s26 progress3,but was always wantingmore milk. ihave now changed to nestle nido.
he has been sufferingwithbadbacterial nappy rash on and off for long while.
he has at least 5-6 poos in a day. i was hoping thenido milk wouldhave stopped the number of poos, but it hasnt.
please assist.