When I started to feed DS formula at 8 weeks I gave it to him at basically room temp. My MIL watched him for a day and started to heat his bottles pretty warm, saying that it is easier to digest that way (heats the water first then added the formula). Now... what I am wondering is, is it necessary to have a hot bottle? Also, DS is on anit-reflux formula and Zantac. The S-26 AR says to mix in cold water but it doesn't say to also feed him with the bottle cold. Should I still heat it up for him? Or should I try to give it to him cool??? AAAHHHHH :? :? :? :? :?