This is a gentle herbal All-in-1 shampoo developed by a veterinarian to give your cat fast relief from itching and skin problems due to fleas and tick infestation. The ingredients, including natural d'Limonene, Tea Tree Oil, and micronized oatmeal are combined in a soothing, effective shampoo. The d'Limonene, extracted from citrus sources, does not contain solvents.