We have a 17-year old beagle man who has developed horrible food allergies in the last four years. We went through months of trial and error to find a protein source that wouldn't turn into a nightmare of diarrhea and tummy upset. I'm not joking when I say this is the ONLY dry food that he can tolerate and he loves it (a bonus!). We can have a little variation in his wet food, as long as the protein is venison, but dry foods wreak havoc with his digestive tract. This is just the perfect food for him. Our second dog can eat anything under the sun, so he gets a different dry food, but once he tried Purevita, he won't touch his old dry unless we toss some of this in as well. I hate how expensive this food is, but it's top quality, the dogs love it, and it has an excellent history regarding recalls. I will never stop buying it for my old guy.