So if this is correct, chickens were first discovered around 4000 years ago. But how about eggs. As you know, more animals lay eggs other than chickens. Dinosaurs are one of the oldest known animal to lay eggs, which dates back to more than 240 Million years back
According to studies by Penn State, "Domestication of the chicken dates back to at least 2000 B.C. and their ancestry can be traced back to four species of wild jungle fowl from Southeast Asia".