Bacteria: Bacteria make up about half of the living organisms inside of the rumen. ... Fiber–Digesting (or Cellulolytic) Bacteria: The fiber-digesters are some of the “fussiest” bacteria in the rumen. ... Streptococcus bovis, “The Rumen Weed” ... Lactate-Using Bacteria: ... Protozoa: ... Rumen Fungi: ... References:
