Thank you to you both. My husband and I are still reeling because of how unexpected it was. He will always hold a special place in our hearts.

Is there a genetic component to Cushing's? I am constantly monitoring his brother, Luigi, to see if he's drinking too much or not enough. I have fed them the same dog food (Purina One Lamb and Rice) for their entire lives. Could I have given Mario Cushing's from something I fed him or some toy that he played with? If I did, is Luigi going to get Cushing's?

Thanks,
Beth (Angel Mario, Luigi, Joanna, and Nellie, the cat)