This invention relates to a method of altering the composition of animal waste, the method including the step of introducing DCD internally to an animal such that animal waste acts as a carrier so that the DCD affects the conversion of nitrogen containing compounds once the waste has been excreted from the animal, wherein the DCD is introduced internally to the animal to achieve an excretion rate for the DCD in the animal's urine of at least substantially 7 kilograms per hectare.
