puff. 1  a short, quick blast, as of wind or breath. 2  an abrupt emission of air, smoke, vapor, etc. 3  an act of inhaling and exhaling, as on a cigarette or pipe; whiff. 4  the sound of an abrupt emission of air, vapor, etc. 5  a small quantity of vapor, smoke, etc., emitted at one blast. 6  an inflated or distended part of a thing; swelling; protuberance.
The Shetland Sheepdog is related to the Rough Collie, both dogs descended from Border Collies that inhabited Scotland. The Border Collies were brought to the Scottish island of Shetland and crossed with the Icelandic Yakkin, a small island dog which is now extinct. By 1700, the Sheltie was completely developed.
Originally bred to herd livestock, herding dogs are intelligent, easily trained companions. Breeds in the American Kennel Club Herding Group may be prompted by pure instinct to gently herd their owners, especially children. Notable herding breeds are the Australian Shepherd, Border Collie, Cardigan and Pembroke Welsh Corgi, Collie, German Shepherd Dog, Old English Sheepdog, and Shetland Sheepdog. Once you've brought your new dog into your life, it'll be time to start training.