Roosters have an average lifespan of 5 to 8 years, though it is possible for them to live 10 to 15 years. A rooster's lifespan is affected by its environment, its level of freedom and the quality of its care.
Roosters are territorial and aggressive when protecting their hens. Roosters are polygamous and can hurt hens when mating if multiple hens are not present. Chicken breeders require roosters for fertilizing eggs, but roosters are not required for the production of eggs as a food source.
Roosters are often kept as pets, but some people abuse roosters and force them to fight for profit.