I am going to try and breast feed the best I can. But I will need to supplement here and there eventually. Idk what formula the hospital will give. In my home state it was always enfamil. My question being, throughout my pregnancy I've been given 3 different types of formula samples, similac, gerber good start & enfamil. Some ready to use, some powder. Is it safe to switch the formula like that for a baby? Or do I need to pick a type and try it & stick with it unless she won't eat it? FTM & this is all confusing.