Dry foods

• Innova. The "senior" blend includes chondroitin sulfate and glucosamine for joints and fatty acids for healthy skin and coat.
• Nature's Variety Prairie. Incorporates raw food benefits by coating each kibble morsel with a freeze-dried, raw-food blend.
• PetGuard. Offers a vegetarian blend with organic grains, vegetables, and fruits.

Canned foods

• Evanger's. Healthy choices for all ages, including a vegetarian dinner for animals prone to food allergies.
• Merrick. Gourmet ingredients include organic chicken and freeze-dried produce.
• Spot Stew by Halo. Touted as the next best thing to homemade food—plus, the company guarantees noticeable health benefits in 30 days.