Cats. Or rather cat feces that is infected toxoplasma.
I just heard it on Forecast Earth so I looked it up. The story is on the Weather Channel page for Forecast Earth, but it’s only a video so I looked around to see there was any text on it. I found quite a bit of info.
Bottom line is please don’t flush litter. The eggs are not stopped by the filters and are finding their way into the food chain that otters eat.
[SIZE=2][COLOR=Gray]DISCLAIMER: I know some of you won’t agree with this and that’s okay you have a right to your opinion, but I also have a right to mine.[/COLOR][/SIZE]