Vitamin D is a fat soluble vitamin. Humans get vitamin D from food sources and the body uses sunlight to produce vitamin D. Dogs also get vitamin D from food sources, but dogs do not produce vitamin D from sunlight. Dogs do need vitamin D however, and if their diet lacks it, or the form of vitamin D is poorly used by the dog’s body, health problems can result.
Vitamin D is critical for proper calcium and phosphorus balance. Vitamin D is needed for healthy bones, muscles and nerves.
Vitamin D deficiency can result from inadequate vitamin D in the diet. Vitamin D deficiency is not uncommon in dogs.
According to veterinarian Dr Walter Gruenberg, “Many homemade diets for dogs are deficient in minerals and have altered calcium:phosphorus ratios. Therefore, a high-quality commercial food, or one designed by a credentialed veterinary nutritionist, is recommended.”5
As with humans, inadequate vitamin D can cause rickets. Rickets can cause weakness as well as pain in legs, stiffness and difficulty in getting up. Bones may grow poorly and be soft.
There is also an association between cancer and vitamin D deficiency.
According to AAFCO Dogs:
1,000 calories is an average amount for a 33 pound dog. Obviously this number will vary greatly. Older, less active dogs may take in quite a bit less. Active dogs will likely take in more.
For a 33 pound dog one of the following would provide at least the minimum amount of vitamin D recommended each day.
Because vitamin D is a fat soluble vitamin, it is stored in fat cells. Vitamin D can accumulate in the body over time. Vitamin D toxicity would be more likely when using supplements than with high vitamin D foods. For that reason, if using vitamin D supplements in high doses, it is wise to have vitamin D levels monitored through blood work.
Has your dog experienced vitamin D deficiency? Do you supplement with vitamin D? Please send us some feedback!