If you do give these to your dog,i have found the ingredients list for these "so called teeth cleaners"! If i were you,i would stop giving them! Rice flour (Minus 1 point): Cheap filler, causes bowel distress and can lead to diabetes in dogs. Wheat starch (Minus 1 point): Poor carbohydrate source causes allergies. Glycerin (Minus 1 point): Sweetens food, used as humectant (keeps food moist), interferes with nutrient assimilation. Calcium carbonate (Plus 1 point): Standard source of calcium, promotes strong bones, teeth, cardiovascular health and skeletal strength, used as a buffer to acidic foods. Gelatin (Minus 1 point): Filler / binder in can food. Gum arabic (Minus 1 point): Cheap filler/binder used in can foods. Cellulose Powder (Minus 1 point): Suspected to include recycled cardboard. Natural poultry flavor (Minus 1 point): Poor quality of flavor additive. Sodium tripolyphosphate (Minus 1 point): Used as rancid meat preservative. Salt (Minus 1 point): Used to cover up rancid meat and fat, can cause kidney and heart disease, hypertension -- used to encourage cats to drink, source of sodium chloride. Not so nice are they? You could maybe try one of these Kong Medium Dog Dental Stick Clean Teeth ToothBrush Toy | eBay UK Far better than Dentastix,and more fun for the dog!