Have you ever dry aged a duck? What did you think of it if you did?I'd try it. As a hunter, first ducks on the water is at first light, if everything goes according to plan. Limit out by 10. Boat house at 11 and home by 12 to start processing. That is almost 6 hours dead. Rigor in full swing. It didn't kill me, but conventional butchering likes things bled out to be kosh or halal. Taste is different. Not bad, just different if it isn't bled.
Pheasants, squirrels, rabbits and even deer aren't bled until back at camp sometimes hours later. So, the guinea is still good. All depends on how you look at it.
Some pheasant hunters like to hang the pheasant by the neck until the body falls before processing it. "tenderizes the meat" they say.
Yes, you can pluck after skinning. Not easily, but if you only want a few feathers, no issue. Keep the clean ones. Skin may tear. You can also tan the hide and preserve it for whatever.
Cheers!