US Patent 8434264 Animal door having an adjustable height

Described is an animal door for enabling an animal to pass through a structure and for having an adjustable height. More specifically, the animal door is capable of being installed at the structure at multiple orientations, whereby the orientation at which the animal door is installed governs the height of the door. Additionally, the animal door is removably installed at the structure such that the orientation, and thus the height, of the door is adjustable.