pulling is such great exersize lol Misty and Ripley are trained to pull me on my bike, Happy wont pull so she just runs beside, though I really wish I could get her to pull because Ripley is half Mistys size and doesnt last near as long as her, and Misty does not pull well without the weight spread between 2 dogs until later in the biking season. I am hoping Electra will pull when she is old enugh, so far she is sort of a stop and go puller, I dont want to teach her that pulling is always bad, but I gotta be able to walk her in the winter too lol