Docking piglet tails: How much does it hurt and for how long?

Area of Science:

• Animal Welfare Science
• Veterinary Pain Management
• Swine Production

Background:

• Tail docking is a common swine husbandry practice with potential for pain.
• Scientific literature presents inconsistent data on the intensity and duration of pain following tail docking.
• Varied assessment methodologies and observation times contribute to inconsistent findings.

Purpose of the Study:

• To identify physiological and behavioral changes indicative of pain in piglets after tail docking.
• To evaluate the impact of cautery versus non-cautery docking and tail removal length on pain responses.
• To delineate immediate, short-term, and long-term pain responses using vocalization, behavioral, and nociceptive assessments.

Main Methods:

• Assessed vocalization parameters (call energy and intensity) in docked versus sham-docked piglets.
• Observed general activity levels of piglets up to 48 hours post-docking.
• Measured mechanical nociceptive thresholds at 17 weeks to assess long-term pain.

Main Results:

• Docked piglets exhibited significantly greater vocalization energy and intensity compared to sham-docked controls (P<0.05).
• No significant differences in general activity were detected among treatment groups up to 48 hours post-docking (P>0.05).
• No significant differences in mechanical nociceptive thresholds were observed at 17 weeks post-neonatal tail docking (P>0.05).

Conclusions:

• Vocalization measures show potential for detecting peri-procedural pain associated with tail docking.
• Activity and nociceptive threshold measures were insufficient to identify post-docking anomalies.
• Further research with alternative methodologies is needed to clarify short- and long-term pain in piglets following tail docking.