NaturVet Outta My Box Deters dogs from eating cat stools from the litter box or yard. Patent pending ProBioStrive contains natural active ingredients to provide a dual action process. Must be given to both dog and cat. Wheat free, tasty soft chews 500ct for dogs and cats over the age of 12 weeks. Active Ingredients per 4 soft chews: ProBioStrive (patent pending) 440 mg. All NaturVet products are veterinarian formulated and manufactured in the USA in an FDA audited, cGMP compliant facility.