Kidney disease is the number one cause of death in older cats and dogs. Here are the common causes of renal failure. The causes of kidney disease include:
Coccidia are tiny single-celled parasites that live in the wall of your dog’s intestine. They are found more often in puppies, but they can also infect older dogs and cats. Dogs become infected by swallowing soil that contains coccidia or other substances in the environment that may contain dog feces.