Concernedchild, A regular abdominal xray shows an obstruction. I would call the Dr and tell them what is going on and request that they check him out. If he is constipated (which is different than an obstruction) You may even ask if he can take any over the counter meds for it. There are several that I know of such as mag Citrate, Fleets Phosphate, (those two he would drink) suppositories such as Dulcolax (Bisacodyl suppositories), or Bisacodyl tabs. The Dr would have to determine first if he is just constipated or obstructed but either way he needs help with it and I would pursue that immediately.
Shelly