constipation problems

Melinda • Ecstatic about my 8th child. Suffered a miscarriage in 2012 & have been trying to conceive for 3 years.
Anyone having issues with constipation?? My baby's constantly becoming constipated And I've tried all the normal things. I've tried the brown Karo syrup with warm breast milk in a bottle, I've tried prunes and they don't work. Tried prune juice, that didn't really seem to work. I tried water too but he's not interested. I even cut out apples and the other things which tend to cause constipation and it's still happening allot. 
He screams and cries and has hard balls of poop. I've had to use those glycerin suppository a few times to get him cleaned out because he cries all night with gas ache and struggles to poop.