There is no way to be sure but we have found fossils of what could be classified as eggs back to before the Cambrian epoch... but don't know which one of the tiny microscopic critters produced them .... but the earliest Shelled eggs were from Amniotes and date to the early Triassic a 100 million years before dino's first showed up...<quoted text>
And where did the egg come from and how did it come into existence?
How was this first egg hatched?
Did the egg design itself,did someone or something else design it?
Was it designed by accidental or random means? How came it by all this information so that it could replicate itself?
You seem to think something is one thing today and tomorrow it's something else... It's a slow process punctuate by Fast adaptation after a catastrophic event changes the environment... Humans acted as a Catastrophic Event with Dogs, Cats and Birds... And is why we have a Chicken in such a short time as 20 to 30 thousand years...