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The 2023 Minnesota Holstein Association Field Day will be held on July 29, 2023 at Olmar Farms in Sleepy Eye, Minnesota. Olmar Farms is excited to host members at their farm where Holstein enthusiasts can gather for good fellowship and educational experiences. At Field Day attendees will get to participate in a judging contest, listen to a stray voltage presentation and receive a complimentary meal from a local smokehouse.  

Olmar Farms Address 

25894 US Highway 14, Sleepy Eye, MN 56084


10:30 AM Barns Open
11:00 AM Judging Opens
11:30 AM to 1 PM Lunch Served
1:00 PM Judging Closes
1:00 PM Speaker
2:15 pm Judging & Door Prize Winners Announced


Stray Voltage Presenters

Larry Neubauer – Concept Electric

Larry Neubauer is a master electrician with decades of experience in the field of stray voltage, milking equipment operations and overall electrical wiring requirements of dairies. He has extensive experience in testing for stray voltage, as well as testing cows for actual body resistance (not assumed but known). Larry’s testing procedures follow an immutable scientific law, known as Ohm’s Law. He has testified numerous times in many courts about issues and findings related to stray voltage, milking equipment systems, farm wiring installations, utility primary neutral conductors and their effects on the operation of his clients’ facilities. Larry has also reviewed a great number of scientific articles on the phenomenon of stray voltage and its effect on dairy cows. He has significant personal field experience in both observing and evaluating the effects of electricity at varying levels on dairy cows and how that affects both the cows and farm management.

Noble Salisbury, Salisbury Electric

Noble Salisbury, owner of Salisbury Electric Inc., is a Master/Journeyman Electrician with 38+ years of experience in  design, engineering and installation of commercial and agricultural electrical systems.  He is committed to the  development of electrical systems that improve operating efficiency for the agricultural community.  Noble works with livestock farms to prevent and mitigate stray voltage from affecting livestock by designing infrastructure to eliminate future issues.  He is a certified UL panel builder and holds patents in moisture control retrofits for grain dryers and monitoring of Neutral to Earth Voltage recording for livestock farms.

Junior Presenter

Mark Rueth


Here is your opportunity to learn from one of the 

greatest showmen of all time!

Mark Rueth, who owns Rosedale Genetics with his wife Nicky Reape in Oxford, WI, will be demonstrating the finer details of taking your showing and animal prep to the next level. Mark has owned, prepared and shown some of the finest cows to walk the colored shavings from Tom Dee to Redrose (1 st R&W to win Supreme Champion at WDE). His judging and showing skills have taken him around the globe, judging the World Dairy Expo, Royal Winter Fair and Swiss Expo. Don’t miss this once in a lifetime experience to learn from the best!