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Pennyroyal in My Cat’s “Natural” Flea Solution — Is It Safe?

Pennyroyal in My Cat’s “Natural” Flea Solution — Is It Safe?

Dear Dr. Narda ~ I just purchased a product from the health food store that claims to be an all-natural flea shampoo for cats and dogs. The main ingredient is pennyroyal oil.  They claim it kills fleas and even some ticks.  Is it safe to use? ~ Cat Lover in...