We have had 2 Chihuahuas that both lived to be 16. I believe they both lived longer lives because of Nuvet products. Both experienced stiffness as they aged until we put them on Joint Plus. Huge difference! Our Minnie had such skin problems that she had raw bald spots until we gave her K-9 Wafers which cured her skin problem & both of them had beautiful coats & more energy! I will always recommend this company & they are very compassionate!