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The effect of early burn injury on sensitivity to future painful stimuli in dairy heifers.

ABSTRACT: Animals that experience painful procedures as neonates are more sensitive to pain later in life. We evaluated whether disbudding with a heated iron at 3 (n = 12), 35 (n = 9), or 56 (n = 20) d of age affected heifers' pain responses to vaccine injections at 11 mo of age. Heifers responded to the injection procedure with struggling and changes in eye temperature and heart rate variability compared to a sham procedure the day before, and still had a heightened response 6 d later, regardless of disbudding age. However, some heart rate variability indices suggested increased sympathetic dominance in heifers disbudded at 35 d, compared to the other 2 age groups, independent of the injection procedure. We also found that heifers disbudded at 3 or 35 d had a higher mean heart rate after the injection procedure compared to those disbudded at 56 d. We conclude that: (1) heifers find injections aversive; and (2) there is some evidence that disbudding age influences autonomic nervous system activity later in life.

SUBMITTER: Adcock SJJ

PROVIDER: S-EPMC7269268 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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The effect of early burn injury on sensitivity to future painful stimuli in dairy heifers.

Adcock Sarah J J SJJ Tucker Cassandra B CB

PloS one 20200603 6

Animals that experience painful procedures as neonates are more sensitive to pain later in life. We evaluated whether disbudding with a heated iron at 3 (n = 12), 35 (n = 9), or 56 (n = 20) d of age affected heifers' pain responses to vaccine injections at 11 mo of age. Heifers responded to the injection procedure with struggling and changes in eye temperature and heart rate variability compared to a sham procedure the day before, and still had a heightened response 6 d later, regardless of disb ...[more]

PMID: 32492026

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Dataset Information

The effect of early burn injury on sensitivity to future painful stimuli in dairy heifers.

Publications

The effect of early burn injury on sensitivity to future painful stimuli in dairy heifers.

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