Physiological and behavioural changes in Holstein calves during and after dehorning or castration
Bibliographic record
Abstract
Physiological and behavioural responses of 17 bull and 12 heifer dairy calves (80.9 ± 1.4 kg) to either hot-iron dehorning or dehorning followed by scalpel castration were compared to both control and sham procedures and to each other. Blood samples were collected via jugular catheters at 15 and 30 min, 1, 2, 4, 24, and 48 h post procedure, sham or control. Cortisol levels remained elevated above controls for at least 2 h after castration and 30 min after dehorning. Initial (T0–T15 min) cortisol responses to castration were not different from those to dehorning. However, they were greater than for dehorning at 2 and 4 h post procedure. Both castrated and dehorned calves kicked and vocalized more frequently (P < 0.05) than during sham procedures. Struggling was greater during dehorning than the sham, but occurred less (P < 0.05) during castration than the sham possibly due to the prior experience of dehorning. Dehorned calves had a higher (P < 0.05) occurrence of both struggling and kicking compared to castrated calves. Heart rate was higher (P < 0.001), compared to control values, in both the sham (P < 0.02) and dehorned calves. Non-anaesthetized dairy calves had elevated cortisol, and heart rate levels as well as more severe behavioural responses to castration and dehorning compared to sham and control treatments. Differences in the responses to each procedure may have been due to handling differences or prior experience of dehorning. Key words: Behaviour, castration, cortisol, dairy calves, dehorning, heart rate
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".