Summary and Implications
A fasting protocol seems to provide a simple means by which the maintenance efficiency of a cow in a given contemporary group could be assessed relative to her herd mates and provide a means by which the herdsman can screen, rank and select cows that are efficient in terms of maintaining themselves.
Iowa State University
Dahlke, Garland R. and Loy, Daniel D.
"Estimating Beef Cow Maintenance Efficiency with a Fasting Protocol,"
Animal Industry Report:
AS 659, ASL R2769.
Available at: https://lib.dr.iastate.edu/ans_air/vol659/iss1/20