Thanks for the suggestions--I'll check back here today to see if there are more.
In answer to one poster's question, I checked the rug's label and it says it's a Capel rug, made in India of 100% jute. It's woven jute with a dark green fabric trim.
Actually, my wife cleaned a previous incident with Chem-Dry stain extinguisher, and though it did remove the stain, it also lightened the area that it cleaned, on the jute as well as the green trim.
With respect to the dog, the +real+ story is that we're minding a friend's dog while the friend is away. This dog has some, shall we say, behavior issues, and this was one of a few incidents.
Needless to say, our dog is a a perfect angel and respects jute ;).
In answer to another poster's question, I haven't the faintest idea what jute is!
-Al