Buffy, the Cocker Spaniel’s collar is getting pretty funky. 'Not sure what she was rolling in, but not only does she need a bath, so does her collar.
It is not uncommon for dogs to roll and rub their necks and collars in the dirt--after all, the collar area is where it is itchy--this can result in a badly soiled collar.Also, dogs that swim in lakes or sloughs can get their collars soaked with dirty water, and if left to dry naturally that funky wet dog smell can permeate the collar as well. Even if your dog is a diva and avoids wallowing in muck, her body oils will eventually start to seep into her collar and cause it to look and smell pretty yucky. Dog collars come in different kinds of material, synthetic fabrics like nylon or canvas, or smooth or rough leather. Some have metal fasteners or chains, some have plastic parts. Depending on the kind of collar your dog uses, you will need to vary how you clean different materials. Whatever type of collar you have, regular collar cleaning is important for good hygiene.
Collars are itchy, so rubbing them in the dirt seems like a pretty good idea to your dog. He also scratches his neck with his hind paw, and whatever that paw is currently covered in. A dirty collar can harbor bacteria that creates skin sores or worse, a poorly fitting, dirty collar that rubs can create hot spots and serious skin infections. Make sure your dog's collar is clean and fits well to avoid these problems, and if your dog has gone for a swim, remove your dog’s collar so that a wet collar does not chafe on your dog's neck and cause sores.