Very tight and high difficulty. Instead of locking it, I just stuff a bigger treat. The locking mechanism only loosen up after many many use and chews by the furkid. But still a lasting toy.

pup enjoys eating her kibbles out of this toy, challenging for her but it keeps her engaged!

We used it first to put treats, it does make the doggos really busy for a while. Best part is you can take it apart as use it as a bouncy ball for fetch, it works too.

He loves playing with this and the challenge of getting to the “locked” treats really stimulate him!

If it's just one pod, it's ok but he still hasn't figured out how to remove the pods when they're locked.