Janet - wow. Ya know, you do the best you can, screening people to adopt your babies, and yet, it's not all under your control. I am so sorry Willow was the victim of bad judgment by her owners. After all puppies are like teens, no real life experience and not much good judgment themselves. That's why we are there, (as owners) to keep them as safe as we can and use good common sense.
I send you wishes for strength to bear up under these trials, and ongoing prayers that Angus will make his way home to you.
Sharon