Is having a rotweiler dog run on a tread mill mean?

Firstly having the dog on a treadmill can be mean, but not all of the time. Look for the signs: 1) If getting the dog onto the treadmill is a struggle, then the animal is obviously not liking it. Which can sometimes prove to be mean. 2) Leaving the animal on the treadmill for longer than ten minutes will tire it out and it could cause disorientation, dizziness and hyperventiliation. Secondly, why do you need to put the animal on the treadmill in the first place? Couldn't you take it out and run around with it? Or how about leaving the animal in the backyard to run around? If the animal does not want to go on the treadmill, and you attempt to force it, you may lose the animal's trust for a long period of time, and you and your dog, could be in for much grief.