Similac milk formula

Any mommies using Similac milk formula for baby under 1 year old? As I suspect baby has gas/bloat issues so I tried Similac Total Comfort. The issue does resolve slightly but the poop is green, watery & smelly everytime. So I changed to Similac Inte-P. Same thing, but poop is yellowish brown, watery too & smell fishy everytime. Now I am trying Bebelac but not sure the response yet as just started. So mommies using Similac has similar poop issues? #Needadvice #firsttimemom