S.B.
My son has a dairy allergy which we think started around 3.5 months. He also was very gassy and started waking up all the time. Due to this I read the book Dealing With Food Allergies in Babies and Children. One thing about the different breast milk is that he would have to have the dairy free for about 3-4 weeks straight until you would notice a difference. GoodStart is actually listed in there as being a partially hydrolyzed formula based on whey and it may help prevent a dairy allergy although it isn't good for a child who does already have a dairy allergy. So if you are going to switch to formula I would suggest GoodStart. If he still has symptoms then you may need a dairy free formula which are expensive. Be careful of soy formulas too because babies who are sensitive to dairy can develop soy allergies really easily. I hope this helps. I went through a nightmare of a time with my son until he was finally diagnosed at 2.5 yrs with the dairy allergy. I wish I knew then what I know now. Good luck!