Hey Tina,
Ben’s poos were crazy like your little ones. He seemed to outgrow it though. At around 4 months, they started getting more stabilized, but, before then, I would often see: runny, honey mustard poos, regular breastfeed baby poos with white seeds and all, green poos, mucous, and sometimes blackish brown specks too.. almost looked like partially digested raisins?? Anyway, as he got older, the poos got more normal, so I think it WAS a digestive thing.
He had almost a month of stringy green poo, but that was while he had RSV and a round of antibiotics, so that probably contributed there.