New ingredients that have not been previously established as safe may need FDA approval. For example, sources of meat may not need to be verified as safe since they already have been, but new additives to dog food may need to be approved by the FDA.
The FDA also regulates dog food labeling to ensure that the label does not make false claims about its ingredients or the function of the dog food. If a dog food company makes a specific claim about the health benefits of the dog food on the label, the FDA may test the validity of the claim.