Lessons Learned in Research on Nutritional Management of Robot Milked Cows – Dr. DeVries, University of Guelph; Dr. Penner, Saskatchewan; Todd Ward, Direct Dairy Nutrition

Podcast Topic

Dr. DeVries presented a Real Science Lecture webinar on May 8, 2024, titled “Lessons Learned in Research on Nutritional Management of Robot Milked Cows.”

Guests:

Dr. DeVries, University of Guelph

Dr. Penner, University of Saskatchewan

Todd Ward, Direct Dairy Nutrition

Episode 108: Balancing diets of Sheep & Goats

Timestamps:

Dr. DeVries begins with an overview of how his robotic milking research has evolved. In Canada, around 20%-plus of farms are using robotic milkers. He describes survey research in the US and Canada as to why producers choose to implement robotic milkers. (9:19)

In Trevor’s webinar, he discussed the large amount of variation in nutritional management of robot-milked cows across Canada. Some of his research with Dr. Penner has looked at the interaction between feed consumed at the feed bunk and feed consumed at the robot. Ideally, you wish to be able to accurately predict intake because that is a primary driver of milk production. Because cows can be supplemented individually at the robot, there is opportunity to better feed cows to match their individual needs. (13:50)

Trevor and Greg describe their respective university’s robot milking research facilities. The panel discusses additional technologies that would be useful for all robotic milkers, like load cells to measure feed delivery and disappearance. Cows typically consume around 250-300 grams of concentrate per minute, and that can vary by feed type (pellet vs mash, for example.) The panel also ponders whether the design of the feed bunk in the robots has an impact on intake rate. (17:35)

As a consulting nutritionist, Todd prefers to feed as little as possible in the robot and have a more consistent mix in the PMR. The level of milk production of the cows can have a large influence on how much pellet is fed at the robot versus the feed bunk. Todd goes on to describe his strategy for creating proportions of PMR and robot intakes for different scenarios. (26:06)

Clay asks the panel what the maximum amount of concentrate should be fed at the robot. They discuss factors that can influence concentration including individual cow variation, length of time in the robot per milking, and the number of visits to the robot per day. Clay goes on to ask how fast fresh cows can be stepped up in their robot feedings. The group has a lively discussion about all the different factors that play a role in that decision. Greg reminds the audience not to get so caught up with programming the robot that we lose sight of the fact we’re still feeding cows and good dairy management still applies. (31:29)

Todd describes some of the biggest challenges he observes as a consultant in robotic dairies, primarily centered around understanding cow behavior. Trevor underlines the importance of cow comfort and other non-nutritional factors in regard to their influence on the success of the nutrition program.(41:29)

Scott asks the panel what they think robotic milkers might look like in 2050 and what problems will have been solved by then. Greg’s wish list includes knowing PMR intake to better manage robot feedings and having cow body weights on every dairy. Trevor thinks we will have a much better understanding of how genetics influence cow performance in a robotic system and how we can raise cows to adapt to the technology to be better robot cows. Todd agrees that body weights are critical and also envisions more individualized milkings depending on each cow’s preferences. On his wish list is a drone that could be used to fetch cows to the robot who have not gone to be milked. (46:51) ​​Trevor and Greg discuss what’s next in their upcoming research projects, and Todd gives some wishlist ideas for future research. (54:18)

In summary, each guest gives their take home messages. Clay is intrigued by the precision feeding aspects of robotic milking systems. Todd encourages dairy producers not to be scared of robotic milking systems. Greg looks forward to research in the next 5-10 years to support or refute the preconceived notions we have about robotic systems. Trevor reminds listeners that cows must consume a certain amount of nutrients in order to produce milk. In the robotic system, those nutrients are delivered via two different components and research continues to understand the interplay between them. Lastly, animal behavior is a critical component of the success of robotic systems and our management approach should reflect that. (1:02:46)

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