Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to buy a retired police dog [title] Evaluate whether a retired service dog would be a good fit for you. [step] Retired police dogs are usually german shepherds, dutch shepherds or belgian malinois. These breeds are extremely active and have been classified by the american kennel club (akc) as part of the herding group.

Ending1: [substeps] Determine whether or not you will have the time for daily walks and play sessions with an adopted dog. All breeds selected for police service require large amounts of physical activity. Ending2: Their game of fetch is marketed as " biscuit dog " and is highly unlikely to be misconstrued by other dogs. Unfortunately, very few have had completed service dog training or have been certified by the akc. Ending3: If you are looking to buy a retired police dog, you will need a dog with excellent endurance. This breed is highly communicative, needs stimulation from other dogs and runs with agility. Ending4: The german shepherd is not the best option for you. [title] Consider buying a retired service dog that is in decent physical condition.

Answer format: ending1/ending2/ending3/ending4