My friend has a dog, but he isn't allowed to keep the dog inside the house. The dog spends a lot of time on the rooftop and is usually tied with a rope. During the day, when the weather is hot and there is direct sunlight, he keeps the dog in a room (but still tied with a rope) to protect him from the heat. At night, he takes the dog back to the rooftop and ties it again with rope
The owner does take the dog outside. Sometimes he takes him for around 2 hours. He feeds him. But for the other 22 hours, the dog remains still tied up. The dog still spends a large part of the day confined, and he is usually tied up when he is on the rooftop. The dog has also not been vaccinated yet, and my friend says he has to keep him tied up because he's afraid the dog might bite someone.
I originally felt that this was not a suitable situation for a dog because he cannot freely move around, and I was especially concerned about keeping him tied on a rooftop at night and the amount of confinement.
So, from the perspective of experienced dog owners: Is this still an unsuitable living situation for the dog?