I know I,m going off at a bit of a tangent here but I cleaned a wilton rug last week the was 100% wool. And it was made in Belgum.
Pretty well what everyone else has said, check the backing. If it's woven. make sure you don't allow it to become overwet. Prevac, Light prespray, lots of brushing, extract using plenty of drying strokes. Repeat if needed.