I hang pheasants in an outhouse, feathers on, guts in, by the neck until the feathers come off in your hand but the skin doesn't, quite. (I like them pretty tasty
) Usually 4 days in mild weather, 7 to 9 in very cold weather does the trick.
My tactic is usually to tie the brace together with baler twine around the necks, then hang the pair on a hook where their bodies hang in space (ie, not against a wall) - and then detach the cat, remove from outhouse and shut door.
I try to pluck choox while warm, then hang by the feet for 24 hours or so in a cool place before gutting. If I can't get them plucked straight away I hang them feathered then pull out the easy-come feathers and then warm them in a sink of warm water to soften the skin and remaining feathers to complete the plucking. It's not as good as warm and dry but better warm and wet than cold and dry, I find.