I used to put a piece of plywood in my cages just incase they wanted to go on it and rest their feet, they never really went on it so I stopped putting it for them, its nice to offer them a litter box with some dirt in it tho lets them have fun, but I would never ever house them on a solid flooring past 2 weeks age unless they're going into a flight pen or something. Even with my chicks and I cleaned their broofer every other day they used to get poop stuck to their feet and I'd be pulling it off I think myself and the birds both enjoy the wire cages over getting poo stuck to your feet.