GARBAGE CAN: A container which your neighbors put out once a week to test your ingenuity. You must stand on your hind legs and try to push the lid off with your nose. If you do it right you are rewarded with margarine wrappers to shred, beef bones to consume and moldy crusts of bread.
BICYCLES: Two-wheeled exercise machines, invented for dogs to control body fat. To get maximum aerobic benefit, you must hide behind a bush and dash out, bark loudly and run alongside for a few yards. The person then swerves and falls into the bushes, and you prance away.