Most meat that you buy from the butchers has been hung. For beef it should be for at least 21 day's if I remember right. For the pheasant though I'd take some of the guy's that shoot's advice, they'll be way more up on the subject than me.
As for the other parts of the bird:
Feathers can be used for fishing flies equalling more food
Bones could be turned into needles (I think)