Schwartz suggests giving vitamin C to dogs with a variety of illnesses, including upper respiratory conditions (small dogs, 125 to 500 mg. twice daily; medium dogs, 250-1,500 mg. twice daily; large dogs, 500-1,500 mg. twice daily), arthritis (to bowel tolerance), infected ears (small dogs, 250-500 mg. twice daily; large dogs, 500-1,000 mg. twice daily), and skin allergies (small dogs, 125 mg. twice daily; medium and large dogs, up to 750 mg. twice daily). read more
In fact, dogs can make vitamin C on their own in the presence of sunlight, just like human beings can produce their own vitamin D in the presence of sunlight. In the past, people didn’t believe they could ever suffer a deficiency of vitamin D as humans can produce it on their own. read more
Most animal species, including dogs and cats, synthesize their own vitamin C from glucose, with the help of an enzyme called L-gulonolactone oxidase. This is referred to as “de-novo synthesis.” These animals ordinarily don’t need to have vitamin C added to their diets. read more