A debris containment system for use with a litter box for containing litter tracked from the litter box by an animal's paws includes a collection pan for collecting the litter. The collection pan is formed to include a funnel portion to facilitate quick and easy disposal of the litter. Preferably, the litter containment system also includes a grid member which cooperates with the collection pan to extract debris which is otherwise trapped between the paws of the animal. Further in the preferred embodiment, the collection pan is constructed of a flexible rubber and can be folded about a centerline when litter is being emptied therefrom.