I was wondering the same thing a few weeks back with my baby.
Her poo has ranged from green, green/yellow, seedy, frothy, ect over the 4 months of her life.
It has been pretty consistent in the past month or so.....basically a syrupy mustard with no seeds.....very very runny. And for about two weeks she did not not go everyday, but maybe twice a week (would be a lot at once) but now she has been going about once a day and it has been a lot all at once aswell.
Just out of curiosity......is your baby small, big or average for his/her age?