Low grain prices, volatile foreign markets and more are making life difficult for farmers these days. The time is long gone when they could simply concentrate on raising a bumper crop. So some producers are banding together in an effort to create leverage in the marketplace. Their efforts are part of a broader campaign in farm country to find new markets for their products. Minnesota Public Radio's Bob Reha reports. A crew of three is on duty at the Pet Care Systems plant just north of Detroit Lakes.. (sfx of plant rolls up here and fades under......) When operating at peak production 30 workers are manning the large clanking machines that load and seal pet litter into bags, The bags then get rolled onto wooden pallets where they're sealed in plastic, and made ready for shipment. Pet Care's product is kitty litter with a dif