No Wet Paws is a smart mat that trains your dog to dry its own paws. In the first stage of training, when the dog steps on the mat, the Arduino-controlled dispenser is activated and drops a treat. When there is no more pressure on the mat, it automatically folds up against a wall that is perpendicular to the door. The dispenser box is attached above the drop mat. Dogs learn to operate it in the same way in which they learn to sit, lay down, use the bathroom, etc. — when they do a good thing, they get a reward. This device uses those same principles. Once the dog has mastered stepping on the mat, you can move to stage 2 to get the paws even cleaner.  In this stage, the dog activates a pull switch by pulling on the mat with a digging motion of the paws.  In either setting, when the dog comes inside and uses the mat to dry off his paws, he gets a treat. The dog will eventually become so accustomed to using this device that he will always use it when he comes inside. The fact that the mat folds back down when it senses the collar of the dog approach serves as a reminder to the dog. The size of the mat will depend on the wall space you have and the size of your dog. Installation is as easy as screwing it into your wall and plugging it in.