Did you know that the activated charcoal inside PetMate cat fountain filters is in the form of tiny little black rods?
Neither did I, until Billy managed to rip one open. As previously noted, the filters are among his favorite toys. I hadn't seen one wandering around the house lately, so I thought we had managed to thwart him. Then I found a couple funny black rods floating in the water. Which I threw away and didn't think anything of it, until I found more.
Turns out he had managed to reach a paw into the space where the water comes out, snag the gauze part of the filter with his claws, and rip a hole. Of course, when I pulled the damaged filter out to replace it, Billy pounced, grabbed it, and went running through the house, leaving a trail of charcoal bits behind him. That's our mighty hunter.... sigh