To enfamil gentelease and I noticed she’s more happy and tummy doesn’t bubble but she’s grunting a lot and when she eats she eats probably an oz and another later before I was using enfamil concentrate like the ready to feed kind and she would eat 2 1/2 oz now it’s an oz . I barely have a day and this morning feeding her the gentelease I told her dr I switched her and she said it was fine. I just don’t know if the grunting is because the formula? Do you ladies that have switched formulas stay on it for about a week or how long? Just don’t know why to do dr gave me 4 small cans of the formula since I asked for it but I feel the ready to feed tastes better idk