My tortoise lives in a large aquarium which is difficult to transport to my neighbor who takes care of her when I leave home for a few days. I needed a much lighter and smaller aquarium and this is perfect. I'm pleased.
We have a Doberman that can chew thru any chew toy. Problem with the hard bones is the NOISE of chewing and wearing of his teeth. The Megalast Rubber Ball Toy by JW Pet is a soft rubber (silicone) that has been indestructible so far and the noise of chewing is much diminished. He really enjoys this toy. The Jack Russell also has fun with it.