For a happy dog life, it is important to not only provide physical exercise but also to regularly challenge the dog mentally. The Karlie dog toys from the Doggy Brain Train series offer meaningful engagement in this regard. The dog is encouraged to search for its reward by opening the hiding spots through lifting plastic cones or pulling or moving sliders. The high-quality and sturdy wooden board, along with the plastic parts used, are robust, lightweight, and hygienic to clean. This ensures that both the dog and the owner can enjoy this great toy for a long time. Various versions are available that can be connected using two linking elements, providing even more variety in play with the intelligence toys. Once a hiding spot's function is understood, the dog must approach the next challenge with focus again to receive its reward. The owner should support the dog by helping with the puzzle-solving and initially guiding the dog in the right direction. This intense interaction strengthens the bond between human and animal and aids the dog in building trust. It is therefore ideal for creating and solidifying a special relationship.