The U.S. Food and Drug Administration is investigating the presence of elevated, potentially toxic levels of vitamin D in several dry pet foods.
Excess vitamin D in the diet can cause lethargy, loss of appetite, and weakness. Without medical attention the symptoms progress to vomiting and increased water consumption and urination. Kidney damage and failure can follow. If you have been feeding your dog one of the foods on the FDA's website then stop feeding immediately and take your pet to his/her veterinarian. Blood tests can be done to diagnose the toxicity; elevated calcium and phosphorous levels, and kidney function values.
The FDA list of recalled foods can be found at: https://www.fda.gov/AnimalVeterinary/NewsEvents/ucm627485.htm?utm_campaign=12-3-2018-VitaminD&utm_medium=email&utm_source=Eloqua&elqTrackId=B1A4CFFF6FDEE6DE41FBB7CE16615994&elq=5036556be0c94e5ea7613f5dac538a1f&elqaid=6140&elqat=1&elqCampaignId=4977