Just wondering if it's best only to give your dog 2 choices: either strictly walk at heel anytime the dog is on the lead or off the lead free to explore (within reason of course). Or is it also fine, maybe even good, to have a third choise: on the lead, but loose lead without being strictly 'at heel', in other words: on the lead, but free to move about so long as the dog isn't pulling. Or does that give mixed messages?