PetCareRx.com, an online retailer of pet medications, petfood and pet supplies, and DogWork.com, an online pet video site, are offering the chance to win free petfood in celebration of the “work” that pets do.

Through December 1, dog owners can submit a photo of their pet "working" for a chance win a one-month or a one-year supply of free petfood. Facebook users may go online and vote for their favorite submissions through December 7. One winner will be randomly selected among these finalists to receive the grand prize of a year's supply of free petfood.

“Our goal is to receive 5,000 contest entries,” says PetCareRx.com CMO, Lutz Braum. “If we get 5,000 entries, we will also donate a one-month supply of food to the hardworking dogs at ECAD which stands for Educated Canines Assisting with Disabilities.”

Please visit the contest website for official contest rules.