My piglets and rabbits like it! Once I figured out how to get the whip off my back (it was just VERY tight) it was easy to put on and SUPER easy to fill and clean. I was skeptical when ordering because it didn't seem like the wire was raised too far to fill, but it opens all the way. My only concern is that the nib will eventually break with repeated use, but there's not much you can do about it.