Liter box liner and filtration system and method

A filter liner system for use with a litter box having an open top and containing litter material for receiving animal waste comprising,

• a bag having an open end and sufficient volume to fit said box within said bag through said open end so that a top surface of said bag lies substantially flat in the bottom of said box and over which litter material is spread, and a bottom surface of said bag is underneath said box,
• the top surface of said bag further comprising a plurality of removably attached filters,
• each filter comprising a plurality of perforations of adequate size and relative placement to allow filtering of litter material therethrough and retention of solid animal waste,
• said filters being commonly removably attached to the top surface of said bag.

A filter liner system for use with a litter box having an open top and containing litter material for receiving animal waste comprising,

• a plurality of layered removably attached sheet-like litter box filter liners of sufficient size to cover the interior of said box,
• each filter liner having a plurality of perforations,
• said perforations being of sufficient size and relative spacing to allow filtration of said litter material through said filter liner and retention of solid animal waste,
• and at least one filter liner without said perforations at the bottom of said layered filter liners,
• each of said layered filter liners removably attached to every other filter liner by adhesive,
• each of said filter liners further including gripping means, and
• each of said filter liners further having pleats which conform to the interior of said litter box.