Collar with snap buckle – Easy to put on and take off. A collar with snap buckle makes it easy to put your dog's collar on and take off. This can be an advantage if, for example, you take your dog's collar off inside. Collars with snap buckles are also typically more adjustable than a classic dog collar. If you have a puppy that grows a lot, a collar with snap buckle will be able to be used for a longer time as it can be adjusted more.