Crowing or attempting to crow
Developing pointed hackle feathers on the neck
Developing pointed saddle feathers near the tail
Growing longer, curved tail feathers
Larger, redder comb and wattles than other chicks of the same age
Thicker legs and larger feet
More aggressive or dominant behavior
Early spur bumps on the legs
Standing taller and more upright
Showing interest in protecting or herding other chicks
Reaching sexual maturity earlier than expected for a hen
Laying no eggs after maturity
Confirming with a poultry expert if signs are unclear