Scientists Found Something Unexpected in Pet Poop—and It’s Not Good

Fleas and ticks can be a nightmare for any pet owner to manage. But a convenient treatment for these external parasites could come with more risks for the environment than we knew, scientists have just found.

Researchers in France studied the feces of cats and dogs administered certain antiparasitic medications known as isoxazolines. They continued to find some of the drugs in the pets’ poop even after their treatment had ended. They also concluded that essential, poop-loving bugs in…