My little one is a FF baby. We started her out on enfamil newborn at the recommendation of our pediatrician. We kept her on this for about 4.5 weeks and after discussing with the ped we switched her to enfamil gentlease - she was very gassy. it has been about a week and a half since she has been on the gentlease and I don't think its going well. She is spitting up more and more, is very constipated and gassy - often screaming in pain.
I have a call into my ped to find out what to do - I am thinking of switching to a soy based formula but was curious if others have experienced something similar and what you did.
We had this problem too with enfamil newborn and gentlease. We even tried soy and she got so constipated I had to take LO to the emergency room because she tore her anus straining to get out the poop. I had been given 8 containers of Similac Advance powder and thought what the heck lets try it.
It worked!!! We have been on it for 1.5 months and she is doing great. Still a bit gassy but otherwise fine. Our pedi told us that different brands have different amounts of the ingredients. For us it was a matter of switching brands.
Good luck. Let us know what the pedi says.