Hartz® Groomer's Best® Extra Gentle™ Soothing Oatmeal Shampoo™. Dog shampoo. America's #1 dog shampoo brand. Butter milk scent. Net contents 532 ml (18 fl oz). Hartz® Groomer's Best® Soothing Oatmeal™ shampoo for dogs cleans and calms irritated skin with a gentle, creamy formula, moisturizers and protein conditioners leave a soft, silky coat. Hartz® and other trademarks are trademarks of The Mountain Corporation. www.hartz.com.