"I started looking for some Senior food for my dog when he was starting to have some trouble with his hips/back legs. The vet told me to give him glucosamine pills, but they were upsetting his stomach. This one has Glucosamine/Chondrotin naturally from chicken cartilage, and is great for the stomach. In fact, it also has something in it to make them digest better, so they have LESS waste, and it is solid, so easy to clean up if they have the occassional accident, which older dogs who can't feel everything in their rear end, tend to do! It is also great for their skin, coat, and has the most antioxidants, which are great for keeping cancer away (not a cure, but it is a great preventative) and to help them recover from illnesses that some older pets can't recover from as easily due to lower immunity. Avocados apparently have the most antioxidants of any fruit, and this food is based on that. Anyway, I saw a huge improvement when he started eating this, his legs are not cured, but they certainly feel a lot better, and the bonus of not having any messy messes to clean up, even better! I am happy about the antioxidants, I don't have proof that they work, but certainly my 13 year old Akita (who has a lifespan of about 8) is doing great, with no illness as of this moment! A++"