I have a Great Dane, they are the German mastiff. At 145 lbs she is intimidating and impressive. The mastiff means she is always alert and watches everything around her. Danes actually make a great apartment dog, mine spends alot of time laying on the sofa watching out the front windows.n They really don't need a ton of exercise but she does have to run everyday. When we take our daily walk all the people we meet cross the street before we get there, don't know why?Had a guy ask me one day what kind of Weimaraner she was. Said the Blue Great Dane kind.