Lug
Solway is a good spot for them, if you look at Borgue, go in the caravan park and its a short walk to the spot, you might pick a thornback up, you freeline rag for Pollack as well.
Dundrennan, walk through the firing ranges, is a hot spot for them.
Abbey Burn foot, drive the car down to the beach, walk left, off the big rocks. you have a chance of all sorts amongst the dogs.
almost anywhere on the Solway, but you will get sick of them
Paul