I don't clean them all the way because all the States I've hunted in require a leg, head, or both as a minimum for transportation. For waterfowl in MN you need a fully feathered wing AND the head attached. It is easier to just do all the cleaning in one session after we get home. My experience has been that birds keep best when hung and kept dry and cool. In all my years I've hunted, I've only had one bird spoil. a ruffed grouse that I skinned, washed, and put in a cooler with ice. I think moist environments (coolers) sometimes promote spoilage.