Choosing the right collar for an Old English Sheepdog requires accounting for the breed's thick neck fur. Standard flat collars can ride up, slip off, or become buried in the coat, making them unreliable for dogs with this much hair. A wide collar — at least one and a half inches — sits more visibly on the neck and distributes pressure over a broader area. Rolled leather collars are another option, as their cylindrical profile parts the fur rather than matting it down.
Harnesses are often preferable to collars for walking, particularly for Old English Sheepdogs that pull on leash. A front-clip harness redirects pulling by turning the dog toward the handler, which is more effective and gentler than a collar that applies pressure to the throat. Back-clip harnesses are acceptable for dogs that already walk politely but do little to discourage pulling in dogs that haven't mastered leash manners.
The fit of any harness over a dense double coat requires careful measurement. Take measurements with the dog's coat in its normal state — not freshly groomed or matted — and check the fit regularly as seasonal coat changes alter the dog's girth. A harness that fits perfectly in summer may need adjustment when the winter coat fills in. Straps should be snug enough to prevent the dog from backing out but loose enough to slide two fingers beneath.
Leashes for this breed should be sturdy and comfortable for the handler. A six-foot leash made from nylon webbing, biothane, or quality leather gives adequate control without being cumbersome. Retractable leashes are generally discouraged for large breeds because the thin cord provides poor control if the dog lunges, and the mechanism can fail under sustained heavy pulling.