[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. 
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.