Food Allergies Treatment

My 10 month old is just starting to refuse formula. He eats baby food and table food fine. I simply can not get him to drink liquids. He doesnt really like juice and will occassionally drink water. He only weighs 19 pounds and is 30 inches already. Hes skin and bones. Im afraid he isnt getting what he needs since he isnt drinking formual. He also has a milk allergy so I can not just switch to milk. Any suggestions.

ok heres the short version my son was on enfamil lipil has gas, fussyness, rash, and spit up so doc switched him to gentleasse and it did the same, so we switched him to soy milk the doc said he was having milk allergies.. so he got alot better but still spit up ALOT.. so the doc said he thinks he has acid reflex so she put him on acid reflex meds zantac and i knotice a huge difference.. but she also switched him to nutramigen… BUT HE WONT DRINK IT HE HATES IT I GOT HIM TO DRINK 2 BOTTLES OF IT IN 2days AND hes still pretty fussy and farts alot… the doc is closed for a week due to remodeling and im not happy with my son not eatting the bottles should i go back to prosobee and the acid reflex medicine or what?
ALSO A LADY RESPONDED TO ANOTHER ONE OF MY QUESTIONS AND SAID “? You need to have an actual allergy test done. Of course he is fussy! Nutramigen is a milk based lactose formula and Prosobee is SOY based, causen protein lactose free formula.” what exactly does that mean…
OH LORD IM A RAMBLER, and i said this was the short version. lol..
THANKS

my son was diagnosed with milk allergies and they switched him to soy, then they switched him agian to enfamil nutramigen… someone told me nutramigen is milk based.. is that true?

On advice from our dr we have changed his formula to a soy based one and his symptoms have all cleared, will this mean that he will have an allergy to cows milk/dairy products in later life?

There is no problem with giving baby soy milk formula. It is up to the parent as to what they want to give their baby. Irregardless if they have an allergy or not. I give my baby soy milk formula because I feel that it is just healthier.