RFI Trials
RFI Bull Test Information

Two trial dates per year are available starting in October and January. The trials are conducted at Cattleland Feedyards in Strathmore, and Olds College.
There is a 28 day “warm up” period with the trials lasting 76 days, for a total time on feed of 104 days. The CHA negotiates a group price each year that includes feeding for 104 days, measurements for scrotal circumference, ultrasound carcass data, feed conversion and ADG data, and a Residual Feed Intake EPD. The HBI Committee has recommended all bulls on RFI trials be HD genotyped for the development of a GE-EPD. At the end of the trial, you will receive a GE-EPD for both RFI and PWG (Post Weaning Gain).


The RFI research project started as a three – year collaboration between the Canadian Hereford Association (CHA), Olds College, Cattleland Feed Yards, Alberta Agriculture and Rural Development, University of Alberta and Livestock Gentec which was funded through the “Idea to Innovation Program”, Natural Sciences and Engineering Council (NSERC), and cooperating Hereford breeders. Dr. John Basarab, senior research scientist with Alberta Agriculture and Rural Development and adjunct professor at the University of Alberta, a world renowned researcher in the field of feed efficiency was invaluable for his assistance with this project. Running for three years from 2012 to 2015 the CHA assisted researchers in measuring over 1000 Hereford bulls for residual feed efficiency (RFI) resulting in functional RFI EPD’s for nearly 1500 head.

Due to the support and ongoing interest for this project, the CHA continues to test yearling Hereford bulls, collecting measurements and data for RFI and PWG (post weaning gain) EPD’s.

Looking for more information? Follow the links:
Feed Efficiency Research for the Beef Cow - Dr Susan Markus
Residual Feed Intake (Net Feed Efficiency) in Beef Cattle


Making Progress with Feed Efficiency - the case for RFI
Written by Dr. Susan Markus - ARD and Adjunct Professor, University of Alberta.

For more information visit:
www.agriculture.alberta.ca (Search for RFI, Residual Feed Intake or Net Feed Efficiency for cattle producers.

Untitled Document