A great place to start when considering a dental chew for your pet is to look for the VOHC Seal of Approval.
The VOHC, Veterinary Oral Health Council, puts its name behind products that meet their standards for control of plaque and tartar buildup in dogs and cats.
They are sort of like the equivalent to our American Dental Association (ADA).
Products that carry their seal show that regular use of the product will reduce the severity of periodontal disease in your pets.
Click here to check out their website for a current list of their approved products.