Sue, from the Portuguese Water Blog, added a comment on my last post saying that Penny's swelling was probably fluid. That's what our vet said, also. He said it would be mostly gone by yesterday - which it was. Aren't vets amazing? I would have said it would take another week for such a big swelling to go down.
Here's a picture of it yesterday, after our first proper walk in more than two weeks:
We had a lovely short walk at Clifton Hill, in the winter sunshine. We used to walk about an hour a day at least, briskly, but for this first outing we simply strolled around for half an hour.