A method for more fundamentally reducing or eliminating the odor of animal excreta (feces, urine, etc.) which can be relatively easily performed and is advantageous economically; a compounding ingredient to be used in this method; and feeds, pet foods or foods containing the above compounding ingredient are disclosed. The feeds, pet foods or foods contain a compounding ingredient which comprises one or more extracts selected from the group consisting of the extracts of rosemary, sunflower seeds, fresh coffee beans, grape pericarp, grape seeds, apple, carrot leaves and tea leaves and an enzyme capable of oxidizing phenolic compounds.