Prescription Diet™ Canine w/d™ has the following key benefits. Key Benefits Once your dog has reached the ideal weight, you can help maintain it by feeding Prescription Diet weight maintenance products. Low in calories & fat to maintain your dogs ideal weight. High in dietary fibre to help reduce hunger & discourage begging Supplemented with L-carnitine, a vitamin that helps burn fat & preserve muscles during weight loss. New great taste your dog will enjoy. Please consult your vet for further information & guidance on what is best for your dog.