 Washington's top news, WTOP. Facts matter. It's 1122. Animal control is investigating the death of a dog who was boarded at the Potomac Yard PetSmart. Owner Andrew Knowles took his dog, Clark, to the PetSmart on June 27th to be boarded for three days. Two days later, a vet called Knowles and told him Clark was dead after being dropped off by an employee. The vet gave what little information he had at the time, Knowles told NBC4.