Good Morning! We have a loafing shed that has 60/40 sand as the floor. We muck it out every 3 days and put fresh hay down for them to sleep on at night. They all (17 total) come back to the loafing shed each night. My question is: how do we clean the top 4 or 5 inches of sand since they urinate on it all night and on days when it's raining? We have thought of using a hoe to chop it up but that doesn't really help turn up fresh sand......