Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to buy dog training collars [title] Decide what behavior you want to modify. [step] People use dog training collars for a variety of reasons. If used correctly, they can be a very effective training tool, especially the kind with a remote that allows you to monitor their behavior even when you aren't standing right next to them.

Ending1: [substeps] If your dog pees on your foot, make a game out of throwing water and sit in front of your dog. As soon as they start running toward you, make a big pot of boiling water. Ending2: Be sure to read the follow instructions carefully. [substeps] When using a collar for years, the collar hook or wrap wrap naturally detaches from the dog's neck and wrist. Ending3: You should discuss the use of this type of collar with a trainer or veterinary behaviorist before deciding to purchase one. It may not be appropriate for your dog or to deter the specific behavior you wish to modify. Ending4: If used incorrectly, they may severely injure or even kill you. [substeps] Choose a collar with a release button to place a collar over a dog who struggles with obedience commands.

Answer format: ending1/ending2/ending3/ending4