Hmm. Here are the main ingredients in Pedigree adult large breed. With dog food, the main ingredients are the ones listed up to the first fat source. Everything beyond that is in very small amounts.
[Ground yellow corn, meat and bone meal, corn gluten meal, chicken by-product meal, animal fat (preserved with BHA/BHT)
Mostly corn. Yummy yum yum. And corn is also one of the most common food allergies that dogs have (which is why so many companies also make Lamb & Rice). I'm not saying that Pedigree will kill your dog. But there are healthier alternatives out there. For example, here are the ingredients to Innova EVO, which is pretty popular here on Chaz.
Turkey, chicken, turkey meal, chicken meal, potato, herring meal, chicken fat (preserved with mixed tocopherols, a natural source of vitamin E)
Much better. Meat, not meat by-products, and a carbohydrate source that isn't corn.
If you're interested in info about dog foods, you should check out
www.dogfoodproject.com
It's written by an actual nutritionist who specializes in dogs, and she presents information very objectively. And it's not a "bash Pedigree and Purina" site. She doesn't advocate one dog food over another--she gives you information on what dogs need, and what exactly each ingredient is and how dogs process it. She includes a list of hundreds of brands of dog foods and their ingredients, and lets you make up your own mind. It's great reading.