"I love this feeder and so does my ferret! I was surprised how heavy it was when we opened the package, but now I know why! It is ceramic and they cannot bite it, chew it up or move it! I love the way it connects to the cage; my ferret cannot move it at all! Since he has to actually put his head into the feeder to get a piece of food, he can't use his paw to scatter it all over like he did with other feeders. I love this design and HIGHLY recommend it for all messy Marvins!"