Pet treatment door

A door and door frame for a pet cage, said pet cage having side walls, a bottom wall, a top wall and a rear wall, said side walls, said bottom wall and said top wall having front and rear flanges extending perpendicular to the planes of said side walls, said bottom wall and said top wall, said front flanges being joined together by means of first bolts extending through holes in a first set of corner brackets and in said front flanges, said first bolts being held in position by means of first nuts, and said rear wall being joined to said rear flanges by second bolts extending through holes in a second set of corner brackets and in said rear flanges, said second bolts being held in position by second nuts, said door and door frame comprising:

• a transparent door connected to a transparent door frame by an elongated hinge, said door frame being mounted on said pet cage over said first set of corner brackets by said first bolts and said first nuts, said door frame having spacers mounted thereon to fill in the spaces between said corner brackets of said first set, said door frame forming a tight seal with said pet cage;
• a gas inlet port and a gas outlet port on said door connectable with hoses for the entry and venting of selected gases into and out of said pet cage through said inlet and outlet ports;
• at least one vent provided in said door;
• and
• a slidable, gas tight vent cover on said door guided by a U-shaped channel and a spacer, said cover including a handle, whereby said at least one vent may be uncovered to transform the cage from a gas tight cage to a ventilated cage.