Allergic to WHAT?! 5 months old?

Wow thats horrible. I am not allergic to any food but if I drink Yogi Sip it makes me vomit and if my boyfriend eats instant pudding it does the same. Some things just don't agree with some people. My sister was allergic to egg but not badly but she out grew it. Im not sure if Ive ever heard of someone be allergic to chicken but some people gave strange allergys. Maybe there is something in the chicken that hes allergic to. My dad thinks that because of the hormones in the chickens I have big . Haha. So everybody will have a different theory. Maybe google it see what it says.