Truck toppers can be a quick and easy housing and shelter for pigs and chickens if you want to keep things cheap. We have 4 truck toppers in the yard. Three of which we left the way they are so the chickens can spread out to dry areas during those snow days. The one in the pictures below I decided to soup it up a bit. My only regret was using cheap OSB wood. Plywood would have been better to last longer. I popped out the side windows and made a nest box on each side that can be accessed from an outside hatch. Added two windows that prop open on the sides with hardware cloth. Also added a heat lamp that we only use when we have young baby chicks and it serves as a great brooder. You can also stack hay bales on it for added insulation.
In the end I did paint it green helping the wood last longer. We landed the four truck toppers for just $2 a piece. No one else wanted them and we saw some potential in them.