Hmmmm, that is a good question. But I think the bigger and better question would be, once the birds had ingested wheat and barley, would that transfer to the eggs and still make the person allergic. That would be my query. The food is synthesized by the birds, but does that stuff that makes individuals allergic transfer through into the egg. You have a quest now to find out two things. And I would find out about both, the grains without wheat and barley and if chickens were fed wheat and barley, would the eggs be bad for a person that is celiac.....I would be interested to know too, just cause it is an interesting thing to know. Post your findings on whatever you find out, we all need to learn. Have a most wonderful day, CynthiaM