I have been involved in dog rescue for many years. I recently took in a very large hound who had been starved within an inch of his life. The vet recommended this (in addition to many other treatments and holistic measures, including yogurt!) to try to quickly get some weight on and good nutrition into the dog. You'd think a starving dog would eat anything, but often times they will not. I had to bake this hound homemade meatloaf for a month. Wellness and Nutro canned were the only "dog foods" I could get him to eat. But he did gain weight steadily, was able to wean off 'human food', and did very well.  After gaining 20 lbs, he was adopted by a wonderful family. When you need the best, any of the Wellness Brands I would highly recommend.