To Elizabeth Watt - Elizabeth, most of the compounds that you named I am not familiar with. Sodium laurel sulfate is a common ingredient in many shampoos, so I think that this one is okay. Two compounds in your original list I am familiar with, however, and you rightly have marked them as toxic. Pennyroyal oil has been known to cause massive toxicosis in animals that have been bathed in it. It's not a pleasant picture, with massive hemorrhage in the lungs and outward through the nose and mouth. Tansy, or tansy ragwort, is a liver toxin which is well documented in cattle and horses, which eat the plant. My caution to everyone would be - just because it's natural, doesn't mean it's not poisonous. Remember, as I said a few days ago, pyrethrins are natural (come from chrysanthemums), and very safe. It's what I use at home. Bruce Williams, DVM Department of Veterinary Pathology [log in to unmask] Armed Forces Institute of Pathology (202) 576-2453/2454 Washington, D.C. 20306-6000 [Posted in FML issue 0822]