Is it one of the following?
The one looks a lot like cuttlebone. I found this other website that lists the ingredients as: Calcium sulfate, artificial flavor (Banana, chery, strawberry, orange), calcium propionate, potassium iodide, color added (red #40), vitamin D3. Calcium (min) 20% (max) 24%.
I'm guessing that it's okay, it has a lot of calcium which is all that matters.