The present invention relates to a collapsible cage assembly including an outer covering and a support frame for supporting the outer covering in an upright position. The outer covering can have a top, bottom, front, back, first side, and second side. The support frame can include a top frame body and a bottom frame body, a first side member and a second side member each being pivotably coupled to the top frame body and bottom frame body, and a top support member coupled to the top frame body. The top support member can define a V-shaped portion. The frame can also include a U-shaped member have a first end and a second end, each of the first end and second end slidably and pivotably coupled to the bottom frame body. The U-shaped member is removably coupled to the V-shaped portion of the top support member in the upright position.