My daughter was the same way. She's exclusively breastfed and from about the 4 month mark on, her poop was basically rabbit-like, if you know what I mean. While she was going once every 4-8 days, she didn't seem overly upset about it. I was freaking out about it, though! One day, all I gave her (besides breastmilk) was prunes. The next day, WHEW! But then she didn't go again for a week. I've realized that she just uses the breastmilk very efficiently! I do try to give her extra water every day to help keep things moving. And her doctor suggested that if I was using Polyvisol with Iron, to switch to the regular Polyvisol without iron since iron can cause constipation. I'm not a fan of glycerin suppositories. Used them once with my son when he was legitimately constipated and miserable--didn't really work that well. Hope this helps!