The Otterhound is among the oldest of the British hound breeds, with roots stretching back to medieval England. While the exact lineage is debated, most historians believe the breed was developed by crossing various rough-coated hounds, water spaniels, and possibly the Bloodhound to produce a dog ideally suited for tracking otters through cold rivers and dense undergrowth. Written references to otter hunting with packs of specialized hounds date to at least the twelfth century, though the dogs described in those early accounts may not have been identical to the modern Otterhound.
By the eighteenth century, otter hunting had become a well-organized field sport in England and Wales, and the Otterhound had emerged as a distinct type. Packs were maintained by landed gentry and rural communities alike, and the dogs were selectively bred for stamina, scenting ability, and a dense, waterproof double coat that allowed them to work for hours in frigid streams. Their large, webbed feet gave them exceptional swimming power, and their deep, melodious voice carried across river valleys so that hunters could follow the pack by ear alone.
The breed's development was shaped almost entirely by function rather than appearance. Unlike many sporting breeds that were later refined for the show ring, the Otterhound's conformation standards grew directly out of the physical demands of its work. Dogs that could not withstand long days in the water or lacked the nose to follow a faint scent trail were simply not bred. This pragmatic approach produced a remarkably hardy and capable hound, though it also meant that early Otterhounds varied considerably in appearance from one pack to another.