At 1 year and 2 months my West Highland Terrier was diagnosed with Addison’s disease. He’s taking 1/2mg of prednisone every day and gets Percoten V shots every 28 days. My vet says that there are really no significant side effects of to these drugs. I guess my question is: My dog is fairly young and he’s going to be having treatment all his life. Is there a chance that the medications will eventually harm him, his kidneys, for example? Are there alternative treatments of Addison’s that do not require any of these drugs?