Tonight I discovered my Pekin duck does this weird thing if I touch her between her wings. I was trying to get my ducks out of their little pool for the night and I had to nudge them a bit. Then I pet my Pekin on her back and her wings lifted a bit and she raised her tail then made this strange sound like she was trying to clear her nairns even though they were clear. When I tried this with my Rouen, nothing happened. My theory is that this is a physical response for mating, kind of like if you stroke a cat on the base of its tail. Does anyone know what's going on?