Another member (newpitowner) brought up the idea of training to pull a wagon. I don't get to walk the dogs much during the day b/c my daughter can't keep up. I hate having to push her stroller & thought that was a great solution. Harley has a way high energy level & if I can train her to do this, it may help tremendously. How would I go about getting started? Are there any good books on the topic? She's a strong bully & I have no doubt she's up for it.