While everyone else is enjoying themselves, dogs often get "left out" at holiday time. That's the premise behind pet food brand Cesar's seasonal campaign this year, so it gives them a chance to get in on the action by wearing a holiday sweater to match their owner's. 

However, not only can dog and owner wear matching jumpers--in a clever twist, dogs actually "designed" them, in a special "doggy design studio" dreamed up by agency AMV BBDO and production company MediaMonks (that's the company recently acquired by Martin Sorrell).

The colors, styles and icons featured on the items were determined by the dogs' speed, agility and how fast they could wag their tails. Even their barks were turned into visual sound waves to be stitched down the sleeves.

The final designs were manufactured in both human and dog sizes, and are available to be won in an online competition. 10,000 sweaters were made and they're being given away in seven countries, including the U.K., U.S., Russia, Italy, Spain, the Nordic region and Japan.

You can see more on how it was done in the behind-the-scenes film below.