Management
index score was calculated by
averaging the chute score, pen
score and exit velocity score.
Blood samples were analyzed
for cortisol concentrations.
Cortisol is a hormone released
when mammals are stressed
or excited. Increased cow
temperament score and
elevated plasma cortisol
concentrations both were
associated with decreased
probability of pregnancy.
These results suggest that
excitable temperament and
the consequent elevated
cortisol concentrations are
detrimental to reproductive
function of cows. These authors
concluded that management
strategies that improve cow
disposition, enhance their
immune status, and maintain
the cow herd at adequate
levels of nutrition are required
for optimal reproductive
performance. Source: Cooke
and co-workers. 2009 Florida
Beef Research Report. In
addition to the danger that
wild, crazy cows create for
cattle producers, the wear
and tear on equipment and
fences, reduced likelihood of
reproductive success is another
good reason to cull poor
disposition from the herd. I
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