I am a therapist and worked in a pharmacy for nine years dispensing and I can only say the best thing you can do for your dog is cook him meals, I have been doing this for a while now and my dog is fit and healthy, had I kept him on Iams it might be a different story! He is happy and healthy and I am happy knowing that what I am feeding him is home cooked with no artificial ingredients, no preservatives no by products just good homemade food. My dog is part of the family and his welfare is paramount. I strongly urge you take your dog off a commercial dog food that is pumping him full of what I can only state as rubbish! But rubbish that is killing him! If we all took this approach then manufactures would realise that everyone has woken up to them and no longer tolerant of what they are doing. I have a large male German Shepherd that is now approaching 10years of age and most put him at 5-6 years of age, the vets cant get over him, and have continually asked me to breed him. I put it down to the fact that he is well looked after, well walked, off proper German blood lines and well fed!