The effectiveness of clove oil and two different cautery disbudding methods on preventing horn growth in dairy goat kids

PLoS One. 2018 Nov 14;13(11):e0198229. doi: 10.1371/journal.pone.0198229. eCollection 2018.

Abstract

The effectiveness of clove oil and cautery disbudding on horn growth was evaluated in goat kids. The study used 243 Saanen doe kids (4±1 days old; mean±SD) on two goat farms that were disbudded with either (i) clove oil injection (CLOVE), (ii) a cautery iron and bud removed (BUDOFF), or (iii) a cautery iron with bud left intact (BUDON). Each kid received a different treatment per bud, which were balanced between buds (left/right) and randomly allocated. A trained observer monitored bud growth following treatment for 3 months recording either: N: no growth, H: normal horn, S: abnormal horn (scur), or SC: soft, fibrous lump (scorn). After the final observation, buds were assessed for the probability of detecting (i) success (no growth), (ii) scurs, (iii) horns or (iv) scorns [with 95% CI]. The probability of success for BUDOFF (0.77 [0.63, 0.87]) was higher than for BUDON (0.20 [0.11, 0.34]) and CLOVE (0.09 [0.04, 0.18]; P ≤ 0.05). Furthermore, the probability of success for BUDON was higher than for CLOVE (P ≤ 0.05). The probability of scurs was higher for CLOVE (0.72 [0.63, 0.80]) than BUDOFF (0.25 [0.17, 0.34]) and BUDON (0.30 [0.21, 0.39]; P ≤ 0.05). There was no difference in the probability of scurs for BUDOFF and BUDON (P > 0.05). The probability of horns was higher for CLOVE (0.21 [0.15, 0.29]) than BUDON (0.02 [0.01, 0.06]; P ≤ 0.05); horns were not observed for BUDOFF. The probability of scorns for BUDON, the only treatment that led to scorns, was 0.41 (0.25, 0.60). These results suggest that BUDOFF was more effective at preventing growth than CLOVE and BUDON and appears the most effective method, of the methods tested, for disbudding kids. Future research should explore other alternatives to cautery disbudding that may be both efficacious and cause less pain.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cautery / adverse effects
  • Cautery / methods
  • Cautery / veterinary*
  • Clove Oil / pharmacology*
  • Female
  • Goats
  • Horns / drug effects
  • Horns / growth & development*
  • Horns / surgery
  • Pain / etiology
  • Pain / veterinary
  • Treatment Outcome

Substances

  • Clove Oil

Grants and funding

This work was funded by the New Zealand Ministry of Business, Innovation and Employment (MBIE: Contract C10X1307 to MAS; Wellington, New Zealand) and the Dairy Goat Cooperative (DGC) Ltd. (Hamilton, New Zealand). Authors that received funding: MS and MAS. MBIE, DGC and AgResearch had no role in study design, data collection and analysis, interpretation of data, preparation of the manuscript or decision to publish. The DGC reviewed the manuscript prior to submission. AgResearch Ltd. (Hamilton, New Zealand) provided support in the form of salaries for authors [MAS, MS, MNH VMC, ART] and research materials. The specific roles of these authors are articulated in the ‘author contributions’ section.