What kind of dog is that in the Dulux paint advertisement? Do you? . .

The dog in Dulux's paint advertisement is an ancient English sheepdog.

Extended data:

The old English sheepdog is one of the oldest sheepdog breeds in Britain. In the rural areas of ancient western England, in order to drive livestock to pasture, farmers raised these alert cows and sheepdogs.

The ancestors of this dog include long-bearded sheepdogs and various European sheepdogs. /kloc-In the 9th century, ancient English sheepdogs were widely used in agricultural areas. 1873, made its first public appearance at the British exhibition. The ancient English sheepdog is a robust, compact, square and harmonious breed. Very charming, rich and thick coat, but not too much, muscular and strong. These qualities, coupled with its liveliness, make it meet the harsh standards of shepherd dogs or shepherds. Therefore, defect-free is very important.

The ancient English sheepdog is a kind of dog breed cultivated for the purpose of grazing livestock and pets. Ancient English sheepdogs were characterized by long gray hair, which covered their eyes. In countries permitted by law, the tail of ancient sheepdogs was usually cut off at the puppy or the first tail joint. This process (called swinging up and down or docking in English) will produce a panda-like tail. When puppies are born, they are covered with panda-like pure black and white short hair, and silver-gray long hair will only appear after the young hair recedes. In ancient times, sheepdogs without broken tails became more and more common, because many countries banned this habit. The British Kennel Club does not encourage ancient sheepdogs who legally cut off their tails. The American Kennel Club stipulates that only participating dogs need to have their tails cut off.

References:

Old English Shepherd-Baidu Encyclopedia