[momofGSDs]

I would definitely get him off the Purina. And I do agree that changing his food to much will not help. Also you can’t just change the food, you need to do it gradually. I also wanted to say that there is no need for the so called Large breed puppy food. I have GSDs who are weaned on Adult. They are fed Raw but also get Kibble/canned. You can feed your pup life stages. But watch the protein as it should be under 25%.