Thanks for the link!
I tried this a few years ago but things didn't go as planned...If you free range your birds then fence in your mushroom logs. I just got the spawn put in mine and the wax plugs on, turned my back for just a few minutes, and the girls pulled all the wax back off! They just pecked the plugs off and dropped them on the ground.
Thinking the logs were pretty much ruined I just tossed them on the ground at the edge of the lawn. A year later I see all my hens congregated in one spot pecking away so I went to check...Yup, the logs fruited anyway and the birds got them all.
Got my supplies here. Very nice people and I'm lucky they are within driving distance for me.
http://www.fieldforest.net/
Think I might give it another try!