Calmer cattle equal better performance

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During the recent Colorado Nutrition Roundtable at Colorado State University, several graduate students from CSU, University of Nebraska and University of Wyoming presented results of their research. Paul Repenning, a CSU student, outlined results of his study on the relationship between behavioral traits and performance in finishing steers.

The trial evaluated cattle behavior using both subjective and objective measurements, and examined the relationship between those behavioral traits and average daily gains and dry-matter intake.

The subjective measurement used chute scores in which workers rated cattle in the chute from zero to five, with zero indicating calm and five indicating aggressive behavior. Subjective gait scores used a four-point scale, with one equaling walk, two equaling trot, three equaling run and/or jump and four for cattle that fell as they exited the chute.

Objective measurements included the number of seconds in the chute and electronically measured exit velocity.

The researchers tested a group of 186 Bos taurus and Bos indicus crossbred steers, weighing them every 14 days for a 70-day trial period. They used a Grow Safe bunk system with radio-frequency identification to measure individual intake, and employed low-stress animal-handling methods throughout the trial.

The researchers found that exit velocity was negatively correlated with average daily gains and dry matter intake in the feedyard, meaning cattle that ran, jumped or fell out of the chute showed poorer performance than those that waked or trotted. In this trial, the objective, electronic  measurement for exit velocity had the strongest correlation with average daily gain, but the subjective gait measure, with scores assigned by processing crews, also was negatively correlated with daily gains. The researchers conclude that subjective gait scores can serve as an adequate representation of objective exit-velocity measurements.

In future research, the team hopes to collect the same subjective and objective behavior measurements at weaning, and evaluate their correllations with lifetime average daily gains, feed intake, residual feed intake and carcass quality in beef steers. If measurements of behavioral traits early in a calf’s life provide a reliable indicator of lifetime performance, ranchers potentially could incorporate them into decisions regarding bull selection, heifer selection, cow culling, calf management and marketing.

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Linda Brady Traynham    
Bryan, Tx  |  September, 23, 2011 at 02:32 PM

Am I the only one who thinks this is funny? Thought ever'body knew better'n tuh run th' cattle 'round senselessly or stress them in other ways. "Excitement" round here is gittin' "honked up" tuh git fed (surprise, you're getting sprayed and maybe wormed, too, this time, but they forgive us) or an occasional bit of fun when the guard donkey chases a coyote and the girls decide that sounds like fun and join in--a cool weather sport. They aren't "pets," but anybody can walk through the herds slowly. We don't use cattle prods, yell at them, or do anything that doesn't emphasize that humans are associated with the good things in life. Been doin' that around here since '49 and thought it was just plain common sense. I would never have thought of stressing cattle deliberately, Dr. Mengele.

Linda Brady Traynham    
Bryan, Tx  |  September, 23, 2011 at 02:48 PM

Th' Angus are purtier, but they'll come up and surround us in th' Jeep for a little conversation, acting more like horses. My favorites are the Black Dexters we raise for the "back to the land" crowd. THOSE are so placid we can walk up to inspect a new calf for gender and condition and Mama just looks proud! I feed the more confident (bossy!) ones by hand--over fences, of course, for safety reasons. Cutest thing you ever saw, those big black tongues picking up hunks of crisp, sweet carrots or even range cubes and ending with what is almost a caress to say "Thank you." Real' nice girls, destined for families where they will be "only" cows or perhaps one of a pair. I haven't got time to treat them like goats, but I want to know that they will respond well to a new environment where they are prized. Maybe it isn't all how I treat livestock; some of it could be the stock I choose to raise. Still can't see any point in runnin' th' fat off 'em uselessly.


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