Re: decrease in poop so late?
My baby was continually changing his pooping frequency with no real rhyme or reason throughout his infancy. He dropped down to one every 2-3 days early on, then went back to a couple every day, then back down to one every 2-3 days again around 6 months (he wasn't taking solids at the time), then back up a few months later, and so on. He starting pooping a little more frequently again once he started eating a significant amount of solids, which took quite awhile. Our pediatrician assured me that all of it is normal.
As long as there doesn't seem to be pain, and poops aren't dried and pellet-like (although they do become firmer once you start solids), then there is no reason for concern.
K. Sophia - Mama to my little lactivore, the amazing Mr. X (11/10).