I have 2 dogs and their responses to this toy were quite different.
The chihuahua from the beginning applied himself to finding the treats ASAP and very quickly mastered a technique to remove the bones using his paws and nose. The toy is particularly useful on wet days when he's not keen to go out, because all the sniffing involved uses up a lot of a dog's energy and helps them to relax despite missing out on their usual run.
The yorkshire terrier however was far more interested in the bones than the treats (despite the fact that they were his top favourite) and with him most of my time was spent in rescuing the bones from his attempts to chew them to destruction! The Dog Tornado, because of its lack of small parts to run off with, has been a huge success for him.
So we're all very happy with the creativity of
Nina Ottosson!