How can you tell that they lack nutrients? I have a basset hound and despite his supposedly excellent sense of smell he still enjoys "chocolate" snacks on a regular basis. He's an adult dog and getting Kirkland food. His weight is consistent and the vet is happy about what he weighs. I would love to be proven wrong (please!) but I doubt he's "snacking" because he lacks nutrients. I think he might be a little slow mentally and maybe he's _that_ hungry and doesn't have access to anything else to eat.