So usually if your allergic to milk you drink soy milk right? But he's also allergic to soy so I guess he's going to have to try rice milk! I guess he might not have to stay off of those foods forever. He just has to do it for 4 weeks and then reintroduce them into his diet, and if he has swelling in his throat then he has to not eat it. If he doesn't have a reaction then I guess it will be ok to eat.
So now I have no idea what to make for dinner!