Allergic reaction to cow's milk?

Auggie vomited last night, developed a fever and was fatigued all day today.  After a very mucousy poop we decided to call the doctor and started questioning whether we were seeing an allergic reaction to dairy.  These slow reacting allergies can take days to appear, so it is possible that although yesterday was day #3 drinking cow's milk, he could have had a recation to it as we have slowly been increasing the ratio of cow's milk in his "formula".  All dairy is out for now as we wait for him to recover.....:(  we get so bummed out when he's sick because we work so hard to get those calories into his body. 

So far, he's tolerating dairy really well!!

Auggie now eats cow's milk yogurt and kefir and I mix heavy cream and grated cheese into just about everything I can.  He loves cheesy rice - kind of like Mac 'n cheese but with rice.  I tried giving him milk to drink but he seemed to balk at the taste (or did I?  I'm not a big fan of milk).  It's hard not to let your own preferences and biases get in the way.  He's still not gaining very much weight, but he's very active and happy so I guess he's doing okay...burning too many calories.....