Flea products are something we all use. No one likes fleas but, we do love our pets! Be sure when applying that it is in a place the pet cannot lick or get at. Accidental ingestion of flea products can cause mild symptoms like drooling and nausea to more severe neurologic concerns such as tremors and seizures. Cats are especially sensitive to flea products containing pyrethrins so reading the ingredient list is key.