Although bacteria from a sheep’s rumen were used, Hasan and Chaudhry believe that the results apply to cows as well, as their rumens are very similar.
Kahit bakterya mula sa unang sikmura isang tupa ng ang ginamit, Hasan at Chaudhry naniniwala na ang mga resulta ay nalalapat sa Baka pati na rin, bilang kanilang rumens ay halos katulad na.