Can DEET-based products be used on dogs and cats?
It’s best not to do so, because pets will lick their fur and could potentially ingest DEET. Companion animal products such as Frontline® and Advantage® are specially-formulated insecticides that ward off ticks and insects. These do not contain DEET. Consult your veterinarian for information about these products. Some fly-spray products for horses do contain DEET. However, experts recommend vaccination for West Nile virus for horses, since this disease is often fatal to them. There are no vaccines to protect people or companion animals from WNV.