J.D.
Have you showed the diaper to the pediatrician? My son's breastfed poops were really jelly-like, and the kid ate constantly, but really thrived, didn't seem to be fussy, so this could simply be what your son's poop looks like. My experience (I've got a healthy 4 year old and a healthy 1.5 yr old) is that if there really is a problem, the kid will let you know...