After many tests (and a few attempts to steal the humans' dinner), we found the balance that makes a difference to the pack's energy, coat and happiness.
What works for us
Every dog is unique: age, activity, weight and sensitivities matter a lot. We always change food gradually, over several days, and we watch the coat, the energy and the poop (yes, that too).
When in doubt, talk to your vet before changing your dog's food. And remember: snacks count towards the day's calories too.