Commercial dog foods generally contain more copper than a dog with copper storage disease can handle. (dogcare.dailypuppy.com)
It should be noted that dogs with copper storage disease should not be given Vitamin C because it may increase the damage to the liver. (dog-health-guide.org)
Although it is possible to provide an appropriate home - made diet for the dog diagnosed with copper storage disease, don't do this without veterinary advice and supervision. (dogcare.dailypuppy.com)