Patient warming blanket

A veterinary patient warming blanket for placement in a single animal cage for post operative warming, comprising at least two layers capable of forming a hollow air space between said two layers for receiving warm air blown from a heating unit via an inlet port at or near an end of said blanket, said two layers being arranged so that said hollow air space forms a plurality of adjacent tubular portions disposed longitudinally within said blanket fluidally in communication with each other, and one of said two layers has at least a portion of its surface formed of porous material so that warmed air is delivered to said patient by gentle diffusion through said porous material, wherein each said tubular portion has tapered sides formed by continuous welds between said at least two layers such that said sides of each said tubular portion are further apart from each other at a first end of each said tubular portion closer to said inlet port than at a second end of each said tubular portion remote from said inlet port and a manifold is disposed between said inlet port and said first end of each said tubular portion, and at least one side of said tapered sides of each said tubular portion is skewed in a range of 1.5 to 2.5 degrees to the longitudinal axis, and said plurality of adjacent tubular portions comprises two opposed outermost tubular portions that have a width about ten percent wider than the tubular portions disposed between them, and a gallery is disposed at a bottom end of said blanket near said second ends of said tubular portions and said gallery is in fluid communication with said manifold, and said gallery has a width between said bottom end and said second ends of said tubular portions which is no less than the ten percent the total length of the blanket.