Reality is a bit more complicated than that. With respects to the species concept, what matters are traits at the population level, not at the individual level.
Think about it this way. If such a thing did exist, the first of its species, the very first true chicken then there would be no other true chicken for it to breed with. The only thing it’s making babies with is something of a different species (like the ancestral precursor chicken species), and thus all the babies would be hybrids by definition.
Granted, all of this is irrelevant, since from a strictly pedantic perspective, the egg obviously came first because egg laying was ancient by the time birds existed.
Reality is a bit more complicated than that. With respects to the species concept, what matters are traits at the population level, not at the individual level.
Think about it this way. If such a thing did exist, the first of its species, the very first true chicken then there would be no other true chicken for it to breed with. The only thing it’s making babies with is something of a different species (like the ancestral precursor chicken species), and thus all the babies would be hybrids by definition.
Granted, all of this is irrelevant, since from a strictly pedantic perspective, the egg obviously came first because egg laying was ancient by the time birds existed.