I have a male call duck, about 4-5 years old. Today I noticed his "manhood" hanging out (which isn't unsual), but upon closer inspection, when I picked him up, I notice that the last 1/4-3/4 inches of his penis was black, scabby looking, and crusty to the touch. Almost looks like frostbite (though we haven't had a freeze here yet). Anybody have any idea what could be going on? I tried to take pictures, but they all came out unfocussed.