Again, each to their own, I've biked all my dogs since I've lived here (20years) cos I've an ideal route out the door. Initially getting grown dogs fit but as they've died and been replaced I find it's a good way to keep both of us fit and have some one to one times (got 3 other dogs) whilst doing some basic obedience/stock/sociability training when I'm not walking them all together.
Cheers, D.