Duck Stuffed with Mushrooms

These cute little mushrooms grow in the  old cow bedding, on the compost pile and in the  middle pasture where the cows get hay. I call them Mulch Mushrooms, but I don't know their real  name.  The cows and chickens have never paid any attention to them.

But every morning when I open the coop, the goose and duck make a beeline to find out if there are any  new mushrooms.  They gobble them up  in a feeding frenzy: