I'm so sorry for what you and your family have been through, lovejack
It sounds like your vizsla had a rough time. And only 3 :sad: We, too, lost a 3-yr-old to an immune disease--although in Evan's case it was IBD.
I know how hard it is to say goodbye when their lives should just be beginning. But he was fortunate to have had such dedicated parents.
We do have a forum here for pets that have passed, if you'd like to post a tribute to your boy.