Forty-two percent reported no flea treatment or adverse events, while 58% had been treated with some parasiticide for flea control. When any flea treatment was given, adverse events were reported for 66.6% of respondents. “The Project Jake findings were compared to a retrospective analysis of publicly available Food and Drug Administration-reported and European Medicines Agency-reported adverse events. This will probably be our last German shepherd, as we are in our 70s and have outlived the previous four. DEAR DR. FOX: We have an 8-year-old male German shepherd who is not fixed.