So, the general rule of 5 minutes per month of age for on lead walking, is what I have been trying to stick to. But, Toby very rarely wanders far from my feet (except to chase a ball), and stays so close, so even though he is off the lead, he may as well be on it. With him staying so close, should I stick to just 15 minutes walking in total, rather than 15 minutes on lead then walking for a bit?