Prof. Jud. Heinrichs conducted research at Penn State on calves fed once or twice a day on pasteurised whole milk with and without a yeast supplement

Interestingly almost 36% of dairy heifer calves are fed on pasteurised whole milk.

Part of the summary states-

" Scours score and total daily score were similar for calves fed milk once or twice a day. These results suggest that feeding milk once a day can be successfully applied to a calf feeding system and that yeast products may improve structural growth."

It concludes "Calves fed pasteurized milk once a day were not different than calves fed milk twice a day in BW, ADG, calf starter intake, growth measurements, or health scores, indicating that feeding milk once a day can be successful. The inclusion of a mannan-rich fraction in the milk and live yeast culture in the starter did not affect ADG, calf starter intake, or health scores. We noted a tendency for increased withers height and hip width in calves supplemented with a mannan-rich fraction in the milk and live yeast culture in the starter."