It sounds like a sanity saver
It sounds like the sort of thing that would get you sectioned if anybody saw you doing it!!
So let me get this right. You killed them, then blew them up like balloons, then let the air out (hopefully they didn't fly around the room making farting noises!?), then dry plucked them as usual? And this made them easier to pluck?
I'm not sure if this is a windup or utter genius. I'm going to have to give it a go though!!