C.M.
I wonder if this is to late... My 3 year old son would do the same thing. And like you the doctors have told me to do all the same things that you have mentioned.. The have some rectal suppositories that umm... here we go are called..Fleet Glycerin Suppositories. Its for children 2 -under 6, they are over the counter and cost little. They are like a laxative. I also have put my son on juice like 3 cups a day or more, but I use apple or cherry, which seems to help loosen things up. I would talk to your docto about something called MiraLax (not certian how its spelled) It helps add more liquid to the stool, making it easier th come out. I hope this helps alittle. And good luck.