What I can say about the Amazing Graze:
They are also indestructible. Mine are more than 10 years old and have been out in all weather.
I tend to use them with hay cubes (the softest I can find). They clunk around, but since the horses mostly roll them along the ground, the cubes aren’t really “banging” around inside. Most of the noise is from when the horses paw the toys or fling them with their noses or crash them into something solid like a fence post or wall. I’ve never been annoyed by the sound, but I have a pretty high tolerance for annoying stuff.
They do get dirty, but I imagine the treat balls get even dirtier due to their flat sides. The Amazing Graze only makes contact on the ground on the ends. They roll them through poop occasionally, but it’s rare for them to be COVERED in poop.
