Is it safe to use Viper Insecticide Dust [Active Ingredients: Permethrin 0.25%] or Sevin Dust [Active Ingredients: Carbaryl] for flea control on a 14 week old Fox Squirrel? If not what is the best dust to use. At this point I have not actually seen any fleas, my little Foxie just is scratching more and more and I know she would not stand for a bath in Dawn Dish Soap which is what I use on my dog.