These are my new bins! My Dh made these compost bins out of 15 pallets. He took about half of them apart to use the wood to put the slats closer together. Since we live with summer temps at 115 for months with single digit humidity we are more worried about the compost drying out than not enough oxygen through the walls which I can get by just turning the pile. It's amazing how fast the piles can heat up after turning! The two bins on the left are for "cooking" the compost and the one on the right which is smaller is for holding extra brown material before using it in the other two bins. He made the front slats removable so I can use as many or few as needed for the amount of compost material in each bin and makes turning and mixing the bins easier. Since it's in the chickens' run they get to jump in and help turn the piles. There are metal covers to use during the heat to help conserve water in the piles
I truly love this set up and plan to copy it just as soon as some of the other projects around the house are completed.