Foldable litter box and litter box with variable volume

A litter box with variable volume, comprising a bottom plate and a plurality of side plates foldable about and extending from periphery of the bottom plate, the bottom plate being provided with at least one bottom fold line parallel to one of the side plates adjacent to the bottom fold line, the bottom fold line extending to opposite sides of the bottom plate;

• the side plates comprising a front baffle and a rear baffle connecting to opposite ends of the bottom fold line, and a left baffle and a right baffle located on opposite sides of the bottom fold line;
• the front baffle and rear baffle being provided with a side fold line extending collinearly from the bottom fold line when the litter box is unfolded, and a first fold line extending from opposite ends of the bottom fold line at an angle with respect to the side fold line;
• the litter box having a first folded state and a second folded state;
• wherein,
• in the first folded state, each of the side plates being folded about the periphery of the bottom plate towards a same side of the bottom plate and connected end-to-end around the periphery of the bottom plate and enclosing a first cavity having a first volume with the bottom plate, with a connection plate extending from a lateral edge of at least one of the side plates and being foldable towards another one of the side plates adjacent to the connection plate, the connection plate being removably connected to the side plates adjacent to the connection plate;
• in the second folded state, the bottom plate being divided by the bottom fold line into a support portion and a foldable plate located between the support portion and the left baffle or right baffle;
• the foldable plate being folded about the bottom fold line, and the front baffle and rear baffle being folded about the first fold line, the foldable plate overlapping the side fold line and connecting to the front baffle, rear baffle, and the right baffle or left baffle opposite to the foldable plate, to enclose a second cavity having a second volume with the support portion.