BioGroom Natural Oatmeal AntiItch Shampoo (32 fl oz) Bio-Groom Natural Oatmeal Anti-Itch Shampoo is made with Colloidal Oatmeal USP...a long recognized, natural anti-itch ingredient. This shampoo works as a natural cleanser and cleans the skin without harsh irritating chemicals. Leaves coat clean, smooth and manageable. Contains unique conditioners to moisturize and soothe the skin on dogs and cats. Cleaners derived from regrowable and biodegrable sources of Palm Kernel, Corn, and Coconut Oils.