Cage construction for use in breeding fur-bearing animals

A cage construction for use in breeding fur-bearing animals, such as mink, and comprising a plurality of cages arranged on a stand, whereby each cage is provided with a breeding coop with an opening giving access to the cage, characterized in that each breeding coop (4) comprises a vertical plastic pipe open at both ends and having a substantially rectangular cross section, said pipe wall being formed by a central foam plastic layer (14a) and an outer and an inner solid surface layer (14b and 14c), said layers being integrally connected, molded projections (5) projecting into the pipe on the inner side of the pipe wall at a predetermined distance from the lower edge (4') of the pipe wall, said projections optionally being present in the form of corner ledges (5') for supporting an inner coop insert (3) in the form of a grate, at least one set of auxiliary projections (8, 8', 8") provided at the lower edge (4') of said pipe wall, said projections being adapted to pivotably mount perforated bottom wall (10) such as a second grate closing the plastic pipe, a part of said pipe wall forming the rear wall (4b) of the breeding coop (4) being extended a short distance above the remaining portion of the pipe and provided with molded means (15) opposing the interior of the pipe, for locking the coop insert (3) in the pipe.