At an INRA cattle research facility in France, Dr. Gilles Renand is using three free‐stall GreenFeed units with young Charolais bulls, steers, and heifers. The purpose of the study is to determine the relationships among genetics residual feed intake and CH4/CO2 production. To date, Dr. Renand has achieved a near 100% animal adoption rate of GreenFeed even though the feed dispensed from GreenFeed is the same chemical composition as otherwise offered to the animals from genetics, residual feed intake, and CH4/CO2 production from about 360 animals over the next three years. Dr. Edmond Ricard, from INRA in Tolouse is also collaborating with Dr. Renand to integrate GreenFeed results into numerical models that predict the Calan gate controlled bunkers. The high adoption rate of GreenFeed is probably due to the training regimen used by the INRA staff. For each new group of cattle introduced to GreenFeed, the animal control alley is removed for up to two weeks so that the animals relationships among animal traits and their genetics. learn to use and compete over the GreenFeed unit without interference from the alleyway. Then when the animal‐control alleys are added, the animals are already well‐conditioned to use the GreenFeed unit throughout the day.
Renand, G., E. Ricard, D. Maupeti, J.C. Thouly. 2013. Variability among individual young beef vulls and heifers in methane emissions. Boof of Abstracts of the Annual Meeting of the European Association for European Federation of Animal Science, Nantes, France. Page 195. View Here View Presentation