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.
Proud and animated, the Shetland Sheepdog is a swift, light-footed runner and an agile, graceful jumper. Though on the small side, this breed has the heritage of an active herding dog and needs more exercise than many other smallish dogs. These bright dogs cannot just sit in the backyard and do nothing.