J.B.
It may be diarrhea, or just loose stools (c'mon girl, we've all had it at some point! lol) At that age though, I think most infants have more frequent BMs (like 2-5 as gross as it sounds) because their tummies can't hold everything we feed them. And since your son's revised age or whatever they call it for preemies is only about 6 weeks old, the infrequency of the BMs would concern me more than the texture... if he has a couple of wet diapers a day, he's probably not dehydrated, but it's my belief that if anything is of concern to you, talk to your pediatrician. My poor son got dragged into the doctor's office once because his eye was slightly puffy (which I took to mean that his eye was swelling shut and he'd be permanently blind and ohmygod what if it's an allergic reaction and he goes into anaphalactic shock, gasp) and found out my son gets mild seasonal allergies just like his father. Nobody in the world but his father and I would have even noticed the slight puffiness that disappeared before I even got to the doctor's office, but it put my mind at ease to have him looked at. Some other possibly silly things that I took him in for - a drop (and I literally mean a drop) of blood I saw when the umbilical cord came off, a tiny bump by his ear that has gone away on its own, the cafe au lait spot that his father was convinced was some sort of cancer, a bite mark from another toddler that I was sure was some sort of exotic skin lesion, and the mommy-diagnosed conclusion that my son is just medically too smart for his own good. Everything except that last one ended up being nothing, but the trip to a calm professional was enough to ease my mind. I can't really compare what your son's stools look like compared to what my son's looked like though because my son was nursed for the first six months, which equaled at least 3 mustard seed diapers a day, eck. Did you ever think you'd go on the internet and post BM colors? lol. Best of luck!