The terms for the male of a given animal species -LRB- stallion , bull , rooster , etc. -RRB- usually imply that the animal is entire -- that is , not castrated -- and therefore capable of siring offspring .

The terms for the male of a given animal species -LRB- stallion , bull , rooster , etc. -RRB- usually mean that the animal is entire , that is , not castrated , and therefore capable of standing at stud .
