This will be my first year keeping chickens (due to arrive in May). I will have three hens. I have a small coop and an attached enclosed run of about 10 feet. I plan to use pine shavings in the coop and construction sand as the base of the run. Question: how often will I need to clean the sand in the run? Is it a scoop-and-sift kind of thing that needs to be done weekly? Thanks for any advice.