No i didnt mean that treadmill took over there excsie , But found if i only bike say 15 mins future than id do both dog the same without having too go back and putting them on the mill (And no matter what anyone says you have too be there over the mill while working the dogs) So didnt help me with mine grab a bike do 20 mins and you'll do more in that time than you will standing over th mill for an hour a dog..
But i know they have there place some of the best contioned dogs in the world were part trained on mills, But too me they were a let down and toonk alot longer than a bike