These are basically portable pens without a bottom that you can move around to different spots in your yard so your chickens can eat all the scary bugs crawling in the grass and dirt. This seems like a good solution. The top hit on Google is a gallery of 140 chicken tractor photographs, compiled by Katy of The City Chicken. It’s neat to see all of these hand-made tractors. No two are identical. Many are made from salvaged materials.