My dogs LOVE this toy- great invention! They play with it even when it is empty of treats! My larger dog (75#) is actually the submissive one and loves this toy because it is a bit too big for my 50# dog to carry around in her mouth. (I do plan on getting another same-sized on for her to put treats in and leave one/each for crate time). Buy it- you won't regret it. Kong products are the best!