Reddit reviews Pet Zone IQ Treat Ball Adjustable Dog Treat Ball (Slow Feeder, Dog Puzzle Toy, Treat Dispensing Toy and Interactive Dog Toy in One)

Oh Lordy I have a ton...I'll try to categorize them...

Best for Puppies
These are all easy toys that dispense a lot of kibble with very little movement. Perfect for baby puppies or really low-confidence dogs. These can also be upgraded in difficulty later by stuffing them with wet food and freezing, or stuffing with a large, hard to extract treat (like a slice of lunchmeat).

• PetSafe Busy Buddy Twist 'n Treat...total pain in the ass to fill if you put more than half a cup of food in it, but it's a great "intro to puzzle toys" for a dog that has never had to work for food before. Also very easy to clean.
  
• Soda Pup Coffee Cup...representative of a whole genre of "rubber toys with large holes" that make great easy kibble toys or challenging stuff and freeze toys. Some other toys in this genre are the Kong and the West Paw Toppl. I like the Soda Pup ones best because they have higher capacity and a flat bottom.
  
• Planet Dog Orbee Tuff Snoop...pretty easy by itself with kibble, can be made more challenging by stuffing a Mazee ball in the large hole.
  
• Plastic Milk Jug...or a water bottle, raid your recycling bin. You'll have to supervise to make sure your puppy doesn't shred and eat the jug, but it's a relatively easy and fun (and free) enrichment item. Another puzzle toy you may find in your recycling bin is a cardboard box filled with paper balls. Sprinkle some treats in the box, fill with the balls, and let your dog forage around in your DIY ball pit.
  
  Easy Rollers
  These basically just dispense kibble by rolling. Not particularly complex, but good for the dog that prefers to solve puzzles by brute force.
  
  
• IQ Treat Ball...this toy takes the longest to empty out of all my toys, but it is way too freaking small and loud as hell on my hardwood at 6am. Really easy to fill and clean though, as it comes completely apart.
  
• Omega Paw Tricky Treat Ball...a lot quieter but it empties faster and isn't as easy to fill (or clean).
  
• Kruuse Buster Cube...this one is also ungodly loud, but it takes a good while to empty despite the fairly consistent payoff per roll. It's a cube (but they also make a spherical one) and the insides have a few baffles to keep kibble from just falling out.
  
  Wobblers
  These require a more finessed rolling motion to empty, so they're the next step up from just batting a toy around.
  
  
• PetSafe Busy Buddy Kibble Nibble...more of a wobbler/roller hybrid. Surprisingly time-consuming for how huge the holes are, and it gets an A+ for filling and cleaning. Unfortunately my GSD knows how to unscrew it, so it's not much of a challenge for him.
  
• Starmark Bob-A-Lot...lots of ways to adjust the difficulty on this one, which is nice. I had a foster chew the yellow piece off of mine, but it still works well.
  
• Kong Wobbler...pretty standard toy, I actually do not have one of these but I know a lot of people that like them. They're available at big box pet stores which is nice.
  
• Nina Ottosson Pyramid...very similar to the Kong Wobbler, but the hole is in a more difficult location. Good toy but the bottom could use more counterweighting for the wobble action.
  
• PetSafe Busy Buddy Magic Mushroom...really good wobble action, but for some reason it's common for dogs to try and chuck this one down the stairs and break it. I've heard of a few dogs doing this, including my GSD. I have no idea what about this toy screams "fling me down the stairs!"
  
  Complex Action Toys
  These need movement in more than one direction (or very specific movement) to get kibble out of, which makes them pretty challenging.
  
  
• PetSafe Busy Buddy Tug-a-Jug...this toy is hard to learn but easy to master. Once your dog figures out the mechanism it doesn't last long. Also that rope gets SUPER GROSS.
  
• Nina Ottosson Board Games...I don't personally have any of these because my dogs cannot be trusted with small parts, but I've heard people say good things about them.
  
• Trixie Mad Scientist...this toy is cool because the dog has to learn to spin the tubes slowly or centripetal acceleration holds the food in. Good exercise in impulse control. I had a DIY one for awhile but my dogs decided to brute force this toy.
  
  Soothing, Low Energy Toys
  Along with the stuff n' freeze toys, these are good for dogs on crate rest or who need some extra help relaxing before bed.
  
  
• Snuffle Mat...great toy for activating a dog's foraging instincts and calming their minds. This is a good DIY project, or you can get extra lazy and chuck a bunch of food into the grass for nature's puzzle toy.
  
• HyperPet Lickimat...my cats eat their wet food from the orange kind ("buddy"), and my dogs use the green kind ("soother") with some PB or cheese as a distraction during grooming. You can spread a thin layer of something tasty on them and freeze for a long-lasting treat that promotes the calming behavior of licking.
  
  
  My dogs (and cats!) eat all their food out of puzzles so I am constantly on the lookout for new challenges! I'd be happy to provide more details on any of the toys I have, or buy and review any toys people have been wondering about :)
  EDIT: btw this Jackson Galaxy Asteroid is my favorite cat puzzle toy. They really need to make one for dogs because it is kinda quirky with its bounciness and super quiet.

Days like today, and many days during the winter, I feed my dogs with little puzzle balls.

https://www.amazon.ca/Pet-Zone-Treat-Ball-3-Inch/dp/B00OZOQN3U/

It doesn't last forever but it's at least some stimulation when we can't do walks. I'm building a collection of them since she keeps mastering them so quickly, lol.

We adopted a retired research beagle and it was really sad to see he had no idea what to do with toys. Beagles are very food motivated so we started feeding him part of his meals using this toy. That got him started.