OMG the culinary barbarians!! Waterfowl should be cooked to med rare or ever so slightly past it if you must. If it's done in the pan it's ruined on the plate. Do not marinade if it contains salt or soy for more than 20 minutes.
Wild game cooking has become a lost art. Ducks and geese are fantastic table fare and the demand for waterfowl is what drove the engine in the market hunting era.