This is the most basic piece of dog-related equipment — a plain collar that snaps or buckles closed. Many people use this type of collar to keep identification and rabies tags on their dogs. This is a great option for dogs that aren’t prone to slipping out of the collar and that walk nicely on a leash.
This type of collar is a limited slip-type collar. It does tighten around your dog’s neck when there is tension on the leash, but it can only tighten as much as the adjustment allows. This helps protect against throat damage that can occur with traditional choke chains. This type of collar is perfect for dogs that tend to back out of their collars. You can see in the photo that the leash attaches to the control loop, which can tighten or loosen with tension on the leash.
A standard body harness with a back attachment is a popular choice for use with small dogs. A body harness prevents potential throat damage if your dog pulls, and makes it less likely that your leash will get caught under your dog’s legs. A body harness can offer more control than a plain collar, but requires a lot more strength from you, depending on the size of your dog. If you are using a long-line for exercise and added freedom, you should attach it to a body harness instead of a collar for your dog’s safety. This photo shows a typical standard body harness with leash attachment on the back.