This is in answer to Rue's inquiry about my 'Chicken Tractor'. Intended for you-Rue and any one else interested in making a tractor.
Just type in Chicken Tractor into your search engine and all kinds of pictures, plans and info will come up. I am town bound with a country boy's heart. Thus my desire to raise chickens helped me to discover the tractor thing. Probably called a tractor because it is mobile. One can move it around like a large wheel barrow. The moving process has two benefits. It gives the chickens fresh grass to eat and they return the favor by fertilizing your yard or garden.
In the top picture you can see the nesting and night time living compartment for the chickens. The door I put on the back allows me to clean it and remove the eggs much easier. I have also built in a side door at the bottom to help clean the roosting area.
The finished product in the bottom picture shows a tarp I can move from side to side to help provide shade and shelter from rain, when needed.
I first started with 6 chickens but reduced it to 4. The 4 chickens provided more than enough eggs for GiGi and I.
Would be happy to answer any Questions. And Rue, would be glad to make you one if you only lived a little closer. SXW
P.S. A simple light bulb mounted in the peak of thier living quarters should provide enough heat to make them comforable in the winter. Of course you would need to run an elctrical cord to the tractor. Another solution would be some type of solar device to supply heat or power for the light bulb. Most chickens would probably manage the cold as thier body heat would help to warm the inside of thier roosting/nesting area. I also have a closable door where they enter.