A complete and balanced diet is needed to keep a dog happy and healthy. When a dog is taking all necessary nutrients required for proper functioning and maintenance, it will also produce its effects by making its coat more luscious and shiny.
In case of an underlying disease or infection causing inflammation, much of the acquired nutrients will get used in fighting against the illness and will not be utilized in improving the overall appearance of the skin/coat.
When to Call Your Veterinarian
If you feel that your dog is already on a balanced diet still lacks a healthy and shiny coat, and has a low energy level: it can be a sign of anorexia. A dull, dry, and crusty skin/coat can be linked to internal medical issues and you should consider consulting a veterinarian Frisco, TX to get the right treatment if required.
Helalth Care 