my baby will be 4 months in a few days. i cut dairy completely from my diet when he was around 6 weeks because he was super fussy. it really seemed to help. this weekend i ate yogurt & a little cheese. 36 hours later he is really fussy. i am hoping this is just a coincidence, since i REALLY miss cheese =) he has never had ay signs of a dairy allergy, he was just very unhappy/uncomfortable around 6 weeks. how long have you stayed off dairy while breastfeeding & how did you reintroduce it?
All 3 of mine (and #4 seems to be the same way too) were sensitive to dairy... they all grew out of it at different points. I'd just try it every so often (like every 3-6 months or so) to see if it bothered them. My first were fine by a year or so...the third couldn't have it til like 2 1/2...(but I noticed the problem later with him too...big time mama brain there!)
I would see an allergist if you're super interested, or just be keen on the symptoms. I'm lactose intolerant and my daughter has a dairy sensitivity (she's 4 months). Here's my spiel, b/c your little guy may be lactose intolerant:
Allergies are an immune response to a protein, and so the symptoms are different. Lactose intolerance is the body's response to a sugar/carb - the inability to digest lactose b/c of an insufficient supply of the lactase enzyme. It is a digestive problem, so symptoms will be limited to things like gassiness, tummy troubles, poop problems. :)
If he is lactose intolerant, sorry, but you're off dairy til he weans - let me know if you want recipe help! :)