Do chickens sometimes age into a rooster?

By that age, cockerels will have long and pointy saddle feathers, while a hen's will be rounded. ... (The shiny, black, curving feathers are the sickle feathers that appear a bit later and can get quite long in some breeds.) Hens ... Plus, the comb is often hidden under the crest, and wattles are not evident in most bearded silkies. read more

The vast majority of the time a hen cannot turn into a rooster. I have had two exceptions during my many years raising chickens. Both hens were quite elderly at the time the gender switch took place. I doubt they ever became fertile roosters, but their behavior was definitely altered. read more

The chicken sexer takes one quick look and slides the chick down one chute or the other. A skilled chicken sexer can sex 1200 chicks per hour, which gives them three seconds per chick. read more