Mine are always on leash unless they're in the (fenced) backyard or at the dog park. But even at the dog park, I think I may need to leash Kaedyn because he can slip out from under the fencing and we've only had him for a half a year so he's still a bit unpredictable with lots of other dogs. So next time, Kai will be off leash at the dog park and Kaedyn will be on leash to socialize a bit more.

Other than that, they're always on leash. We're surrounded by busy roads full of trucks, buses, car, people, dogs, etc. I don't think I could ever trust two herding dogs off leash with a bunch of 'sheep'. But, I've been doing something with the two that is a bit like what Par's doing. I've started using the flexi-leash so that I could have them come during any time of the walk and so that I could teach them to 'go home' but still be within my control, just in case I ever needed to use that command.