That's my primary method of composting too, except I don't let my chickens at any of the bins.I have three compost bins, the first one is hot and it's where I add all the fresh compost items like poop, sawdust and grass depending on the season. The second bin is a finishing bin, the third bin I leave open for the chickens to scratch in. When the first bin gets pretty full I start the transfer from finished to bags and 2 to 3 and 1 to 2. Takes about a year to get to bin #3
JT
The run gets compost in it over time from scraps and treats I give the chickens, manure they leave there, and grass clippings, spent bedding and straw I occasionally put in there. I don't worry about harvesting the run much though. I will likely dig it up this Spring to get some of the dirt I need for new and expanded raised beds.