This is obvious, as long as you lose the concept of religion.

Taking evolution into account, which some religious types even agree with, the only answer is the egg. It is true that there were many forms of animals that greatly resembled the chicken, with all of the same functions. However, the Chicken we know today could not have come to be if not for the egg it hatched out of. The creature that laid that egg was a slightly varied ancestor.

Go as far back as you want. But when the chicken stops being a chicken, it had to lay an egg to make the first. No matter how you look at it, except from the point of view of an almighty deity, the egg had to come first.

This question is not just about poultry versus dairy. This is a question of belief. If you say the chicken came first, even after the above explanation, then you also agree that this chicken came out of nothing. The only way this could be possible is through a creator.

So why don't you ask the real question?

Which is correct: Religion or Science? How are you so sure?