Bests & Worsts Reviews from Amazon

I've been using this toy wrong all along! It is actually pretty challenging for the dog if you know how to fill it. You can put the treats through the holes in the knobs, and when the dog pushes the knob over the round dents, the treat will fall in. So this is actually a multi-step puzzle: Step 1: push the "wings" out of the way Step 2: push the knobs over the dent, so the treat will fall into the dent Step 3: push the knob back to its original position, so it no longer blocks the dent. Step 4: fish out the treat Step 5: repeat 7 times, because that's how many knobs there are. Occasionally a neighboring wing will also get in the way of trying to move one of the knobs, which adds the extra challenge of figuring out why the knob isn't moving, and solving that problem! It's great! Edit: We've now upgraded to the level 3 difficulty. I wasn't sure if it was even possible for a dog to figure out something this complex, rather than just moving pieces at random until the food comes out. It took her about half a year to get this good, but now one of my dogs can empty the entire puzzle within less than a minute. (This is not a fault of the puzzle, it's just that she's apparently a genius!) She knows exactly that she needs to turn the center wheel first, so that the knob can be moved over the hole to make the treat fall out. She does it very methodically now; you can watch the video if you want to be impressed! She figured this out all on her own, I never showed her any of this. My other dog has been using this puzzle for the same amount of time, and he's still at the "beat it up until treats randomly become visible" stage. Seems he's less intelligent. I am very happy with these toys. I've already recommended them to a few people who asked me about them.