It is one of three whelping houses at the Puppy Haven Kennel, the 1,600-dog compound that Havens has built up over the last 30 years in the outlands north of Madison, Wis. Nearby, an affable elderly couple hosed feces from slats below the cages, and their daughter, another of Havens’s 14 paid employees, swiftly handled one squeaking pup at a time, issuing dewormer.