Mo. measure on puppy mills passes

Missouri will have tighter regulations on dog breeders under a ballot measure approved Tuesday. Proposition B establishes new rules for dog breeding in a state that has drawn national attention for a high number of so-called "puppy mills." The measure requires anyone who has more than 10 breeding dogs to meet certain standards for housing, food and veterinary care. Owners will be limited to no more than 50 breeding dogs. Opponents had warned that Proposition B would affect licensed dog breeders that follow the rules and could make it more expensive to buy pet dogs. Others feared the measure could be a precursor to additional regulations for animal agriculture.