A dog food recall over possible dangerous levels of vitamin D has been expanded.
The Food and Drug Administration launched an investigation last year into the presence of elevated and potentially toxic levels of the vitamin in dry dog food, after receiving complaints from pet owners about dogs suffering from vitamin D toxicity.
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The symptoms of vitamin D toxicity in dogs include vomiting, loss of appetite, increased thirst, increased urination, excessive drooling and weight loss.
FDA testing on samples of dog food did confirm excessive and potentially toxic amounts of the vitamin, which is an essential nutrient for dogs, although high amounts of vitamin D can cause serious health problems like kidney failure and even death.
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