A sheep in wolves clothing?

Cycled along to Tilly to meet a pal for a socially distanced bacon roll, and met this flock of "swamp sheep" wading around in the wetlands at the foot of the Ochils.  Was particularly drawn tot his one, partly for his (her?) mournful face but also unusual colouring, which looked more sheepdog than sheep (er, Rover.....???)
Extra is the rest of the flock, in what looks a positively primordial landscape :-))