There is a dark wooled variant of the Texel, known as blue, though it's actually just on the dark rusty side of black.
This one had got himself into a particularly evil bit of mud in the outer moat, up to his ears. Legs down into stiff mud make excellent anchors, so the only thing to do is go in along side him and pull each leg out horizontally onto the surface, and when all four are out he can then be dragged - all 130kg of him.
There was a definite need to hose all my clothes down before letting them anywhere near the washing machine. Hurrah for constantly available hot water & baths.