So sorry Alyssa, I didnt know Duke was this bad.
I can't imagine what you are going through with Zira and Duke. I dont have any advice, and I certainly don't know what I would do in this situation. I have to agree with what Sunflowers wrote though, thats the best way to look at it. I will keep you, Duke and Zira in my thoughts though, and will be wishing for the best for you and your pack. You are NOT a failure either, dont feel that way. You have given these dogs a chance at life.