mine eat some of the mushrooms that grow in the lawn and garden, but I have not yet securely identified which ones. They don't eat, or don't eat a lot of, King Alfred's cakes, jelly ears, a large polypore that grows on live oak, or a white club fungus that grows on dead wood. I couldn't say for the mycelium because it's practically impossible to observe them eating that, if they do.I currently wonder about mushrooms and chickens. i grow Lions Mane, Red and Black Anter reishi and turkey tail. I'm less curious about the actual mushroom body as I am the mycelium as well as the tea and tinctures that i make for myself. I often wonder if these are things that may benefit the chickens.