medium-sized dog standing on a concrete floor

medium-sized dog standing on a concrete floor. The dog has dark brown fur with lighter brindle markings. It also has white markings on its legs and chest. Behind the dog, there's a stack of white bags. The dog is looking downward and then yawns. There's a piece of white string lying on the floor near the dog's feet. The environment looks like an indoor or sheltered space, possibly a storage area.