Yellowcake, Your chooks must be making a fortune. A close examination of your shed shows what I believe to be extra revenue laying under the wire grate i.e. an egg has been laid directly onto the ground, probably happened when a hen was on the perch. Management consultants advice to egg collector(s), "check under the grate for more eggs"! Like your cleaning system using the grate. I have always thought a mobile free range shed had huge potential in the egg industry cf battery layers. Cheers Buffett PS The egg on the ground could be cracked so better check(LOL)!