I am looking for advice on buying a jogging stroller with baby #2 in mind (not yet on the way!). I have a 19 month old and would like to take him with me on my runs, but don't know whether to go ahead and buy a dual jogger since we plan to have another baby. I have heard that you shouldn't put a baby in a jogging stroller until he's about 12 months. Any advice out there?