I bought the smallest for my dachshud puppy and he loves it. He prefers this toy over his puppy kong which cost 4 times as much. Ive ordered the larger ones for my other dogs and puppy when he gets bigger. I was very pleased with it's quality especially condidering the cost of it. Can't beat 2 dollars for 3 treat balls.
I love this ball, have a dachshund and she loves it too!! Got her a bigger one so it would not roll under furniture. When I leave I put a few treats in it and she doesn't even notice me walk out the door, she is too busy with the ball. She has learned it so well that when I am getting dressed to leave she goes to her "treat ball". She is not a chewer as I have seen in other reviews so I don't know about that part.