Our pets rely on us entirely for their nutrition. So if you're making your own judgments that could lead to a mistake. At the same time we have more control over our pet's diet than we do with our children or with ourselves so your vet can tell you what is appropriate for your dog and you can assign them that.
If the label presents them with a contract that the band don't want to sign all the label has to do is wait. There are a hundred other bands willing to sign the exact same contract so the label is in a position of strength.