While of course if that's how it happened. The Bible teaches us that God made all animals in a mature state<quoted text>This is a nice teaching aid to make that point:
But I also admired (Topix poster) thinking's point that the idea of there being a boundary immediately solves the chicken-egg problem. If we stipulate to the premise that one day, a pre-chicken suffered a mutation and was the parent of the first chicken, then of course the egg it laid - a chicken egg - came first.
So if this is correct then the chicken came first. Back to the old argument I'm afraid. Lol.