Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to train a deaf puppy [title] Learn how to get the dog's attention. [step] Thumping on the floor as you approach the puppy will usually work, since even deaf animals can feel vibrations. Flicking the light switch on and off is another option.

Ending1: A flashlight is useful if you let your dog into an enclosed yard at night and need to call it back. [substeps] Vibrating collars are available that will let you get the dog's attention with a remote control. Ending2: [title] Sing or talk to the dog as you approach. [step] Waving your hands is also another way of drawing the dog's attention and keeping it engaged. Ending3: It can help your puppy understand what's going on in the room, and also can prevent the door from banging. [substeps] While it may help you to get the puppy's attention with the bang, a clapping ring prevents this tactic from working. Ending4: To work up a sweat, scream at the top of your lungs and run towards your deaf dog. [substeps] It's best to try this with the puppy a few times a day.

Answer format: ending1/ending2/ending3/ending4