Dispatch.
Remove "icky bits". (actually, the parts which decompose fastest)
Chill to get carcass out of the bacterial danger zone
Rest/Age for rigor mortar to pass (approx 8 hours)
Continue to wet or dry age to desired tenderness. **OR** move to freezer (will require a wet age while enzymes work during an extended defrost period for tenderness.) The closer the bird is to freezing before moving to the freezer, the fewer (and smaller) the ice crystals will develop, resulting in less cell damage, and thus less fluid loss during ddefrost and rest.
[Mild, low acidity marinades or brines can be used during this period to impart flavor - high acidity marinades break down proteins, leading to mealy texture, and should be brief - not more than 8-12 hours. Brines add flavor and aid moisture rention in low slow cooking methods - like smoking - but do not create tenderness. That occurs when the meat is taken past "done", allowing connective tissues to gelatinize.]