C.P.
Nicole,
My daughter had a similar reaction to cow's milk. She had more frequent and very runny bowel movements, and she threw up quite a few times. We had her tested for dairy allergies, and sure enough, she's allergic to dairy. We now give her rice milk, which she really likes! (We tried giving her soy milk, but she had the same reaction to the soy milk that she had to the cow's milk.) My only concern was whether she was getting enough calcium, since she can't get it from dairy. Her pediatrician told us not to worry, that if she has a well-balanced diet and drinks enriched rice milk, she should be getting enough. He said we could give her Poly-Vi-Sol if we wanted, but it isn't necessary.
Good luck!
Cecily