Dental Dog Treat No Wheat, Soy, Or Corn In Them Due To Their Little Nutritional Value And Are Common Allergens As Well; No Animal By-Products Or Harmful Preservatives, And With Only All Natural Human Grade Ingredients Kong Dental Chews Are The Ideal Anytime Treat With Added Parsley And Alfalfa For Natural Chlorophyll To Extra Breath Freshening. Contains Stay-C A Patent Protected Bio-Available Form Of Vitamin C Fights Plaque And Tartar Buildup; Reduces Chances Of Gum Disease While Inhibiting The Growth Of Dental Bacteria. Helps Reduce Halitosis (Bad Doggy Breath) Made In Usa. Comes In Three Sizes: Small, Medium/Large, X-Large