Choose a Comfy Collar
As for collars, most dogs do fine with a nylon or leather collar. Choose a style, color, and pattern that you like and looks good on your dog. If you have an adorable Poodle or cute little Terrier, a pink collar with a fancy design might be a fun choice. For a Yellow Labrador or German Shepard, a traditional dark leather collar could be a fine selection. It’s really up to you!
Most importantly, you should make sure the collar fits your dog comfortably. It shouldn’t ride up on your dog’s neck or slide down to the shoulders. A good rule of thumb is that the collar should fit snugly but allow you to slide two fingers underneath it easily.
While chain-slip and prong collars may help suppress unwanted behaviors, they don’t teach proper dog walking behavior.
Say “No” to Chain-slip and Prong Collars
Please avoid using chain-slip or choke collars, which have a chain that tightens around your dog’s neck as it’s pulled. Prong or pinch collars should also be avoided. These collars have prongs that point inward towards your dog’s skin and cause discomfort when pulled or tugged.
While chain-slip and prong collars may help suppress unwanted behaviors, they don’t teach proper dog walking behavior. At the very least, they can be unpleasant for your dog. At worst, they can cause injuries from minor bruising to more serious nerve damage. If you’re thinking about using either of these collars, contact an experienced dog trainer for help and advice first.
-from the ASPCA