Most feedlot cattle, on the other hand, are fed in the morning. This means they have nothing to eat in the evening when their instincts are telling them to graze. This could be why they are more aggressive in the early evening, says animal behaviorist Julie Morrow-Tesch. She believes that the nightly pushing and shoving matches that she has witnessed on Texas feedlots "are a substitute for cattle's instinctive twilight grazing." She estimates that these evening melees cost feedlot operators an average of $70 per head. The cost would be even higher if environmental factors were taken into account, she says, because the disruptive behavior "can raise dust levels above allowable limits."


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