With the way I have setup my flying pens, it is easy to let the pigeons bathe. I place a metal bath pan on the landing board and level it with a wood block. Then I fill the pan with water and let the birds out on the landing board. There is plenty of room for the birds to bathe and relax in the sun. I like to give the birds a bath each Sunday after a race. Cleanup is easy. All I do is pull the bath pan out and dump the water on the grass. The shingles on the landing board are not damaged at all by the water that gets spilled or splashed by the pigeons. The pigeons are protected by the screen as they bathe so they are relaxed and calm.