I clean mine out completely every 5 or so days. I hate it when my coops get dirty. Plus the cleaner the coop the less likely they will get sick. Now for the non show/breeder birds. I have a tendency to let the coop get a little a dirtier since they don't need to be in top condition at the moment.If this is a major issue for you you really need to clean coops more often. Feet feathers are going to get a little dirty, but if they're totally stained or clumped with droppings...that's a management issue.