The term INCAPABLE OF LITTERING refers to animals that have been SPAYED or NEUTERED. Spaying is the surgical removal of a female animal's reproductive organs, while neutering is the surgical removal of a male animal's reproductive organs. This procedure prevents animals from reproducing and helps to reduce the number of unwanted animals in the world. By spaying or neutering an animal, it is rendered incapable of littering, meaning it cannot reproduce and create more animals.