When I take my dog out for 2 hours in the morning she will need another hour out before bedtime. Even though she gets periods of mental stimulation and brushes up on tricks in between. She has been able to settle herself since before she was 6 months old. If I take her out for 2 hours in the morning and 2 hours in the evening she sleeps most of the day. We have short periods of training throughout the day or when out, depending how long we are out for.
I still can't see why a dog who spends 4 hours a day outdoors, walking, swimming, chasing a ball, sniffing in the undergrowth, practising loose lead walking, heelwork, recall, scentwork etc is a problem to anyone.
She is focussed on me. She is not bothered by other dogs, people, children, joggers or traffic. She is not a problem to children. Though they can be a problem to her, as can other people's dogs when they insist on running up to her.
Don't get me wrong I agree that if someone cannot control their dog enough for it not to run up to other dogs or people it should not be allowed off lead where there are likely to be people. I don't agree that all dogs should be banned from all public places.
Some dogs are a nuisance because they haven't been given any training whatsoever. Some dogs are no bother to anyone because the training and exercise the dog needs has been given. The behaviour of a dog is down to its owner.
I spend two hours in the evening up the top of the mountain. We see the occasional dog walker but no people screeching from afar, "Get your dog on a lead! My son doesn't like dogs!"
It is bliss! I'm off up there now 😊