The problem of vitamin D toxicity in dry dog food may be bigger than expected.

The U.S. Food and Drug Administration (FDA) is adding another recall to its initial two, following an investigation that found elevated levels of vitamin D in a number of goods.

According to the FDA, this is a developing situation and additional recalls may be announced.

New reports indicate the goods come from a manufacturer that makes products marketed under several different brand names.

The administration’s scientists are currently analyzing all information available to determine whether the illnesses are definitively connected to diet. Samples of some of the products were evaluated and test results indicated the food contained as much as approximately 70 times the intended amount of vitamin D.

Consuming food with high levels of vitamin D is potentially toxic to dogs, and in severe cases may lead to kidney failure and/or death. It also can cause vomiting, loss of appetite, increased thirst, increased urination, excessive drooling, and weight loss.

The FDA encourages veterinarians treating vitamin D toxicity to ask their clients for a diet history. Vitamin D toxicity also may present itself as hypercalcemia, similar to when dogs consume rodenticide, the administration warns.

The list of recalled dry dog food products provided to the FDA includes: