Good day. The child has had green stools several times in a row for a …

Good day. The child has had green stools several times in a row for a week now. Breastfeeding + complementary feeding is full-fledged (soups, cereals, cottage cheese and so on). Nothing like green food was eaten, there's no complaint about the belly, the stool is normal in consistency ?, it happens once every three days. To the doctor soon. What could this be?