Formula milk

10months S26 lactose free Hi mga mah my baby is currently experiencing some diarrhea pedia decided to change his milk from Enfamil A+ to S26 LF, I'd like to ask if may same experience kay lo to changing his milk due to diarrhea, sabi ng pedia painom ko lang hanggang maging okay sia then balik na sa enfamil A+ the question is medyo nalilito ako sa instructions nia dahil 1scoop lang sia sa 2oz maliit lang naman ang scoop nia and nakalagay sa level instructions dun sa milk is 1 is to 1. Bakit po kaya ganon? Okay lang po ba yon na 1scoop in 2oz pero 1 is to 1 ang nasa guide ng milk pero iba ang guide ng pedia?