23 POULTRY AND ANIMAL RAISING AND HANDLING EQUIPMENT-NAMELY, FEEDERS, CONVERYORS AND COMPONENTS THEREOF, ANIMAL FEED CLEANING EQUIPMENT FOR SIFTING LITTER AND DROPPINGS FROM FEED-NAMELY, CHAIN POWERED SPROCKET DRIVEN REVOLVING FILTER SCREEN ASSEMBLY, ANIMAL PIT CLEANING AND WASTE REMOVAL EQUIPMENT-CONVEYORS, LOADING AND UNLOADING CHUTES, SCRAPER BLADE ASSEMBLIES, CONVEYOR CHAINS, PADDLES AND CONNECTING LINKS, DRIVE AND IDLE PULLEYS, CABLES AND FASTENERS, VIBRATORS, EGG COLLECTING AND HANDLING UNITS COMPRISING A SYSTEM OF CAGES AND/OR NESTS AND CONVEYORS, WASHERS, STACKERS, ARRANGERS, AND PACKERS; WINCHES; PULLEYS; AND SYSTEMS COMPRISING WINCH AND RELATED COMPONENTS NORMALLY SOLD AS A UNIT, FOR COVERING SIDEWALL OPENINGS IN ANIMAL SHELTERS