5 Ways Pets Assist Mental Health While Social Distancing Seresto, developed by Bayer and now offered by Elanco, works by releasing small quantities of pesticide onto the animal for months at a time. The pesticide is supposed to kill fleas, ticks and other pests but be safe for cats and canine. Even before U.S. borders had been closed to many pet homeowners during the pandemic, flying with an animal had turn out to be significantly extra complicated. The ban, which went into full impact Oct. 14, is meant to prevent animals at high threat of rabies from coming into the…