(NY) Congenital Tremor Pestivirus of pigs was determined to be the cause of piglets born with congenital shaking or tremors. The virus was confirmed by PCR test for the virus, on a sample of tissue from an affected piglet, at the Iowa State Veterinary diagnostic Laboratory, where the virus was first characterized. The condition is now referred to as congenital tremors but has been variously referred to as myoclonia congenital, “shaker pigs” or “dancing pigs.” A video of affected piglets provided by the Iowa State Veterinary diagnostic Laboratory is available on YouTube.