Fido's Flea Shampoo is a mild flea eliminating shampoo, specially designed to prevent irritation on even the most sensitive of pet's skin. The active ingredient is Pyrethrins, which is highly effective in the external treatment of fleas and lice on both cats and dogs. Fido's Flea Shampoo not only rids unwanted parasites from your pet's skin, but also produces a soft, shiny and lustrous coat through use. For best results, use weekly in summer months and alongside eradication maintenance in your pet's bedding. Use only as directed on the label.