I'm afraid to say that we may have to join the ranks with you mamas as well. DD has been having an increasingly tough time pooping since she really got going with her solids at around 9 months. It's to the point now where she needs a suppository every other day or so just to go - her poop isn't all that hard, just huge!! This morning we had a full-on meltdown when she was trying to go, DH had to run to the store to get the Pedia-Lax enemas so she could finally have a BM. DD will be one on Thursday.
She eats very healthy, LOVES yogurt, veggies, fruit, etc. I am afraid it's the fruit that's doing it, her constipation always seems to be at it's worst if she's had a lot of fruit within the last 24 hours. She had issues when she was 3 - 4 months old as well and we had to switch her formula and also give her prune juice in her bottle once a day to keep her regular. I am going to try her on a GF diet soon if things don't improve - DH has major gluten intolerance, but he has the opposite of constipation when he eats it!
I hate the idea of giving her anything "chemical" to help her go, but I don't really know what else to try diet-wise. I will try prune juice again I suppose, even though I hate giving her juice too, and I don't really think a probiotic would work since she's already eating at least a cup of yogurt a day. She does have a piece of toast (whole wheat) with organic butter daily, as well as the Earth's Best brand of cheerios, but that's pretty much it as far as wheat products go. Oatmeal seems to help about half the time.
I will keep checking this thread to see what other mamas come up with. Good luck everyone!