Nestlé Purina PetCare Company has issued a recall for some lots of its prescription dog food, Purina Pro Plan Veterinary Diets EL Elemental, due to potentially elevated levels of vitamin D.

The recall was first issued in February and expanded to two additional product lots in March. 

While vitamin D is an essential nutrient for dogs, too much can cause vitamin D toxicity. Symptoms include vomiting, loss of appetite, increased thirst, increased urination, and excessive drooling that leads to kidney dysfunction.