At least 50% of a dogs brain is controlled by its nose. Their noses are extremely powerful, even flat nosed dogs!
So when we stimulate the nose we are also tiring them mentally. Whilst providing essential mental stimulation if we structure it and do it under our control.
So get your dog using its nose. Check out my impromptu video of my dogs searching for peanuts at our previous house, enjoy. Your dog will love you for it.