I was planning on getting a Collie Rough bitch from a breeder friend early last year. She was the daughter of Tully's great love Sydney, and another Collie she did agility with. The Collie was playful but gentle with my two and the three got along well. But the bark - OMG, I thought shelties were bad, that high pitch, much louder bark of the Collie was the clincher. It even stopped my two in their tracks. I think I'd need to be on larger block to get away with that bark.