I like another man's explanation who's name I can't remember now,

"the egg came first but the thing that birthed it wasn't a chicken".

It explains genetic mutations and evolution perfectly.

I've said this many times. The mutation occurs, the egg is produced, so whatever birthed it wasn't a chicken. Ergo, the egg came first.

The first amniote eggs, which are eggs with a protective shell allowing them to be laid on land, are thought to have appeared around 312 million years ago.

Chickens evolved about 9000 years ago.

Not even a close race, the egg won.

Every thing crawled out of the sea even the ancestors of the chicken, Barney the dinosaur. I have no answer.

actually Barney came straight from hell

The chicken rolls over, grabbing a breath she half pulls the cover over her slim but shapely feathery body leaving one clawed foot and some thigh exposed to balance the heat whilst the egg reaches to the bedside cabinet. Placing a smoke in its improbable mouth he lights it, exhaling a long steady stream of smoke followed with a couple of almost perfectly circular rings of smoke he exclaims "well that solves that age old question"

I suppose the egg would need chickens legs but I never thought about it
However the egg needs lesson in smoking

its cheaper that way

Outstanding that is

The chegg came first