Any looser than this and the collar could slip over the dog's ears. Check the collar occasionally to see if your dog has any redness or hair loss under the collar. Choosing the Type of Collar For Your Dog Buckle Collars Buckle collars are overall the best choice of collar for most dogs in most situations. Puppies should wear only buckle collars. Nylon Collars Nylon collars are good for dogs that are in water a lot.
Nylon is very durable and washable, and come in a variety of colors .
Leather Collars Leather collars wear well and are very long lasting. Collars also soften from the oils in your dog's skin. There is a right and a wrong way of putting these collars on and should only be used during a training session by experienced hands. They are designed to briefly tighten and apply pressure when the trainer is delivering a correction. Never leave a dog unattended with one of these collars on as they may cause injury or strangulation if the collar was to get caught on something.