Needless to say, she's someone else's dog now. The adoption agency did "cat-test" her, but I expect that she was distracted with something else in the room and paid no attention to the cat. She paid a lot of attention to our cats, however, and a dog can't be trained out of that kind of behavior. I brought her back to the agency first thing the next morning.
However, we had met another dog at the adoption agency who does get along with all my pets, so I brought her home with me. Shadow raced for a season, poorly, and was retired quite young. She's shy and nervous right now. She suffered a broken bone in her ankle and is recovering, but limps on that leg a little bit.
Darkman seems happy with his new sister, although he wants her to play with him more. That will come in time as she heals up and gets comfortable with all of us.
The cats sure seem happier.
Darkman and The Shadow