Interpath offers Sasha's Flexi Bites. They are a natural treat developed for active, aging or arthritic cats and dogs. Meant to promote joint function and relieve arthritic symptoms, the Bites are bacon flavored. According to the company, Sasha's Flexi Bites have no grains, fillers or perservatives, and are made with marine concentrates, antioxidants and venison.