Starting last Monday LO hasn't been pooping very much, it is about once every other day. Usually he poops a couple times a day, he is still having plenty of wet diapers. The weird thing now is that the last couple times he has pooped it is different than his normal poop. Normally he has very yellow seedy poops. Now since he has been pooping less his poop is a dark yellow, almost starting to look a little brown, and it is a lot thicker than it ever was. It is definitely not like peanut butter consistency but a couple steps below that if that makes sense, and it isn't seedy. He isn't getting anything other than breastmilk so what could be changing his poop? Is it normal or OK for him to have poo like this?