FIDOS CHEWSTOP Fidos Chew Stop Bitter Spray Has Been Formulated With An Extremely Bitter Taste That Discourages Dogs And Puppies From Chewing Household Items Like Furniture Clothing Shoes Plants Etc. A Useful Training Aid For Helping Young Puppies To Understand Boundaries.How to use: Spray a small amount on the object that is being chewed. Check for colour fastness first on furniture. Reapply as needed.