The phrase "dog collar" refers to a type of collar that is specifically made for dogs to wear around their necks. It helps owners keep their dogs on a leash or to identify them. Full definition
How do you choose the best leather dog collar for your pet? (selfpetcare.com)
Welcome to our complete guide to the best leather dog collars around. (thehappypuppysite.com)
I would also have this dog wear a dominant dog collar when on leash - how to use it is explained in the dominant dog DVD and on my web site. (leerburg.com)