Delrex™ Shampoo Kills Fleas, Ticks, and Lice Fast Leaves a refreshing eucalyptus and mint scent Contains botanical pyrethrum to eliminate fleas and ticks Rinses clean without a sticky residue Formulated with .15 % pyrethrum to effectively kill fleas and ticks safely and quickly. Rinses clean without sticky insecticide residues. Cleans and conditions, leaving coats soft, shiny, and fresh-smelling. Safe for puppies and kittens over 12 weeks old. Ready to use. Delrex Shampoo is available in the size listed below.