If there's anyone interested in how things are with Eva, the orthopedist tried a steroid injection. Her limp got worse. The option they offered was to remove the biceps tendon, a $3000 procedure, and they weren't sure if they would have to do the other side. Plus the whole "cutting things out of the dog".
Owner took her to see a rehab specialist vet (
http://www.backontrackvetrehab.com/). This vet doesn't think the biceps tendon is the problem, she thinks it's a symptom of instability in the shoulder. Her diagnosis is right medial shoulder subluxation. I asked, because I was anxious about it, and apparently the vet thinks it's the result of a traumatic event, and not predisposition. A huge relief to me, since I think Eva has a beautiful front, and if it turned out she was predisposed to shoulder injury, I'd have to give up on my own knowledge of structure.
So, she has some exercises to do, which she apparently gets very pouty about, and there is hope of her being able to return to normal activity.