Fun with prizes!
When the dog presses the large button on top of the device, a portion of dry treats previously placed by the handler in a semi-transparent container will fall out at the bottom of the device. It is important that these are dry treats with a maximum diameter of 10mm.
The button is large, corresponding to a square with a side of 11cm. If you feel it is too easy for your pet, you can increase the difficulty level by simply removing it. You are then left with a much smaller button in the shape of a 52mm diameter circle. This simultaneously allows you to increase the diameter of the dry food to 15mm.