portable coop flooring

[Terrie Mac]

Hi, I’m new to the forum and new to chickens. Whoopppeee--been waiting years for this!! My husband is building a raised (waist level) portable coop on wheels to house the 4 chickens we plan to buy next week.

We are trying to figure out the coop’s floor. Right now its ½ x ½ galvanized wire.
My husband is going to make a (hard) plastic liner, possibly sectioned for easy removal. I wish I could fill it with sand but then it wouldn’t be movable!! Guess we’ll settle with shavings.

How deep should the liner be to keep the chickens happy and the smell down?

Thanks!