nina ottosson dog twister purple blue 11Dog Twister Purple Blue In Dog Twister, the dog must find treats by sliding the pie shaped discs in different directions. The game can be made even more challenging by securing the discs with dowels, which the dog must then remove before the discs can be moved. The Dog Twister is, of course, designed to help you and your dog have a good time. Your dog must learn to find the treat, the reward, by sliding one disc after another in different directions.