My 5 week old BR chicks spend a lot of time preening themselves so I wanted to give them something to have a dust bath in. I like to garden so have several trays that come with the flats of bedding plants. These obvoiusly need to be the ones with no ridges in them but still have the drainage holes at the bottom. I put 4 inside each other (for added strength) and added some soil and sand for them to bathe in. I must note that this is a temporary solution as I don't think the trays will last long and I am sure they will outgrow them. It seems the things they learn when young, what to eat etc are all learned when they are fairly young so I wanted to introduce them to dust bathing. I will later build a bigger box for them as I think this will help to keep them cooler in the summer if the soil is moist. It's already hot here in Alabama - too hot for me.