Has anyone had this? We're on Gavage. Poop is green with lumps. The ba…

Has anyone had this? We're on Gavage. Poop is green with lumps. The baby eats every 2 hours. Started giving formula. Poop became normal yellow without lumps. But I breastfeed especially at night and that's when he poops first good digested formula and the rest green from breast milk! I'm thinking maybe just remove breastfeeding. Don't torture the child!