If the dog is pre-clinical and showing no signs or symptoms, we recommend changing the dog’s diet to a food that has been feed-tested for nutritional adequacy. No specific cardiac testing is necessary; however, if you are concerned and/or you have a dog that may be of potential higher risk, like a golden retriever, we can consider having testing of the taurine levels and/or an echocardiogram done to evaluate for signs of heart enlargement or dysfunction.