Korean researchers evaluated the effect of different starch sources in calf starter on rumen development. The pelleted starter fed during the study contained ground corn, ground barley, ground wheat or crimped oats as the starch source. The researchers fed the starter free-choice along with mixed grass hay. The researchers say “better functional rumens” in calves fed corn and wheat as the starch sources resulted in greater feed intake in these calves than those fed barley and oats. The results were published in the March Journal of Dairy Science.