Before unhooking the leash and allowing them ultimate freedom, you must make sure that they will be reliable off-leash. What do I mean by this? Well, in short, you must feel confident that your dogs will listen to you when you have no means to control them (come when called, leave or drop items when you tell them to, etc.). It’s a big world out there and you need to keep your dog safe. Just as you wouldn’t give your nine year old child an 11:00 curfew, you wouldn’t give your dog, who has not been properly trained and prepared, all the freedom in the world if he hasn’t proven he can handle it.
Can it be done? Absolutely! Can it be done overnight? Absolutely not!