Diane, My Kayla had exactly the same thing at 3 months of age. At the time, other LCs and LLLLs said it was probably too much foremilk and I tried to nurse her longer one side. I guess it improved. This same baby had bright yellow, thick, foul smelling stools for a few days at 6 months of age. All along she gained well and was fine in all other respects - slept - alert and responsive when awake - a satisfied feeder. I couldn't believe one baby could have such a variety of stools and could never narrow it down to anything, not even what I had eaten. Perhaps these are all in the range of normal possibilities. Maybe someone else can shed some light. Eileen Martell, London, England