Hi and welcome from me, too. My Gable was 90 pounds and I only started him on 40mg which we did have to lower to 30 and then 10 because his cortisol dropped too low. He was down to 5mg when he died from an acute attack of pancreatitis. It's very important to keep up with the testing and watching for signs of the cortisol dropping too low, too fast, and it's better to start low and increase the dose if needed. My vet was willing to work with me on the lower doses and Gable did well for a pretty long time and was 12 when he died, four or five years after being on the Vetoryl. Please don't let your vet talk you into higher dosing.

Joan