 Non @-@ ruminant herbivores produce vitamin B12 from bacteria in their colons which again make the vitamin from simple cobalt salts . However , the vitamin cannot be absorbed from the colon and non @-@ ruminants must ingest feces to obtain the nutrient . Other non @-@ ruminants that do not follow these habits must ingest the vitamin from other animal products , and cannot benefit from ingesting simple cobalt salts . 
