Our V loves the treadmill! We definitely don't push her too hard since we don't want to hurt her, but it is a nice option when the weather is bad. When she was a few months old we straddled the treadmill and had her walk like 1 mph for 2 minutes. We'd do this every day just to introduce her to it and how it works. Pretty soon she LOVED it. We'd go down to the basement with a load of laundry and start to head back upstairs. We'd look for the dog and there she was, sitting on the treadmill wagging her tail. We'd up the minutes and speed little by little, but never overdid it. Vizslas are smart and pick things up quick, but be careful because you will have to stop them...otherwise they will never stop!