How much dry dog food should a Golden Retriever eat per day?

It sometimes varies with different dogs. If the dog is getting ample exercise everyday then 1 cup twice a day (one in the morning and one in the evening) would be good. Again, depending on the dog, 1 heaping cup once a day would be fine too. Most dog foods give recommended servings based on the weight of the dog. It's best to follow this and adjust as needed. If you see your dog is loosing weight add a little more, if is gaining weight reduce. Foods have a wide range of protein and fat levels as well.