1pheas4
Moderator
If the birds are kept cool they will not spoil. Leaving the skin on keeps the meat from drying out.
It can prevent freezer burn too. Obviously leaving birds un-skinned isn't always an option, but for what it's worth; In the past I've had pheasants in my shop freezers for 2 years or more (pen raised birds reserved for taxidermy. Obviously the birds are left whole/un-skinned until they are ready to mount).
Even after 2 years the meat is still good to the point there's really no difference between the meat of the older birds vs the freshly killed birds. The feathers/skin seem to act like a buffer between the freezer and the meat. No freezer burn or "freezer" like taste.