Filthy Animal Shampoo Filthy Animal is a ??:1 ultra high concentrate natural alternative & does not contain soap or detergent. Since Filthy Animal is safe to use with other flea & tick products, it is a must for summer season! Filthy Animal is made with natural oils. Filthy Animal is safe on skunk and body odors, grease, oil, and dirt without drying the skin or coat. Filthy Animal is mild, pH balanced, natural, biodegradable and safe to use with flea control products.