“The Humane Society, a national animal protection organization separate from the Benton-Franklin Humane Society that operates a shelter in Kennewick, used public documents to trace shipments of more than 15,000 puppies from commercial brokers to Petland stores. The Humane Society said the Pasco Petland — the only Petland store in Washington — gets its puppies from Mid-America Pet Broker LLC of Neosho, Mo. The U.S. Department of Agriculture earlier this year cited the broker for buying from b