BC,
My dad ran a little country store while I was growing up in the 1950s. There was an air compressor in the toolshed, and one of our regular customers was a part time trapper. When he got a beaver, he would come by with it in his truck. In preparation for skinning it, he would cut a small slit in the hide on the inside of a leg, insert the nozzle of the air hose, and inflate the sucker. Seems that helped separate the hide from the carcass and made the critter easier to skin.
So he said anyway...
Thanks for the memory, that was a long time ago.
hth,
lpl