Four Indiana dog breeders are named in a new Horrible Hundred, a report examining problem puppy mills and dog sellers around the nation. The sixth annual report from the Humane Society of the United States highlights cruel conditions at puppy mills, which Kathleen Summers with the organization explains are large commercial breeding operations that emphasize quantity over quality. And she says some horrific conditions were found at the Indiana facilities on the list.  At an Odon breeding operation, puppies and dogs were found in sweltering kennel buildings with heat indexes over 100 degrees, many showing signs of heat stress. Summers notes the report does not list every puppy mill or even the worst of the worst, but is instead a snapshot of the scope of the problem.