Pet Parasite Meds Linger in Feces, Endangering Wild Insects

French researchers find isoxazoline antiparasitics used for fleas/ticks can linger in dog/cat feces for weeks after treatment (median half-lives 15–25 days; some drugs detected post-treatment). Simulations suggest dung‑feeding insects in the wild may face high exposure, prompting EMA reevaluation and calls for more environmental studies and potential changes in pet‑waste disposal during treatments.