L.H.
My doctor had me give 1/2 tsp of dark Karo syrup per 4 ounces of formula 1-2 times a day. It's an undigestible sugar (and it's safe, unlike corn syrups, etc.) that basically greases his intestinal tract and helps his hard poop to loosen/come flying out :) I don't do it every day, but it helps when he has been bound up and needs to be "unplugged". And it was my pediatrician who recommended it, a man who has been practicing for 30+ years and is "the" doctor to go to in my area. I had worries about the Karo syrup but my sister (a doctor) and other doctors online recommend it to help unstop the little ones.
Hope it helps :)