Captain Edwardes placed his puppies with his tenant farmers to work rats and other vermin in the barnyards while the pups matured. When he went around later to visit the pups, he was accompanied by a pair of his most belligerent adult terriers and a shotgun. He expected the youngster on the farm to firmly stand his ground when approached by the aggressive older dogs. If they gave an inch (backed up or turned), a shot ended the cowardice.

Those that passed this test faced a second one at a year of age. A live polecat (skunk) was hidden in a burrow after being dragged in a sack for some distance. The prospective yearlings were placed at the start of the drag. Spiritedly, they had to follow the scent trail to the burrow opening, enter without any hesitancy and dispatch the dangerous and furious animal. The Captain waited by the entrance with his trusty shotgun for the faint of heart or those with second thoughts. Others with slow reflexes or a lack of strength were also culled—by the polecat. Obviously, the Edwardes strain became extremely game and aggressive.

Since this was the breed of only one man, it was fortunate that, after Edwardes's death in 1891, other people took up the cause of the Sea-lyham. One of these was Fred Lewis, whose tireless work in promoting the Sealyham and sponsoring an organization gained him the label of father of the breed, although there is no doubt the actual "father" was Edwardes. The British canine authority recognized the Sealyham in 1911 j the same year the USA recognized the breed.

Independent and long-living pets, Sealyhams need frequent brushing and occasional trimming and plucking. Even more grooming is necessary for the show dog. The breed has rather low-set, drop ears and a docked tail. Despite their past history of toughness, the modern breed has mellowed considerably. He is still game and self-assured, but certainly more peaceful. Firm, fair discipline is the best way to approach training.