Icecoldcynic said:
How is any of that relevant?
I read a bit more on the discussion that occurred before I made my second comment. I see what you are saying. You are trying to say the mutation occurred first within the adult animal and was then passed along to the offspring. Mutations tend to only happen as a result of hypermutation, radiation, viruses, transposons, chemical exposure, and during meiosis. These mutations are not present over the entirety of the animal, and rarely in reproductive organs.
Random mutations that occur within an adult of the species are only very rarely passed along through procreation.
Genetic drift is more important, during this process genes can arise, become recessive, or even disappear altogether. So something very like a chicken breed with things very like a chicken, and laid and egg, what came out of the egg was ever so slightly more like a chicken and could also breed with those things very like a chicken, and the distinction that it could breed with modern chickens as well.
Basically the egg came first because something ever so slightly not a chicken laid an egg that was a chicken. The only other way is to believe that something ever so slightly not a chicken mutated into a chicken then laid eggs that where also chickens.
The thought that poof new species is born is wrong, evolution continues, maybe hindered by breeding for homogeneousness by humans among modern chickens, but still the process is alive in chickens today.