Effects of three pharmacological protocols in pain control in holstein calves by hot-iron dehorning
DOI:
https://doi.org/10.22256/pubvet.v12n4a77.1-12Keywords:
animal welfare, bovine, clinical ethology, horn excision, local anesthesiaAbstract
The objective of this study was to study the efficiency of three protocols in pain control by evaluating behaviour in calf dehorning. Thirty heifers were distributed in three groups for the application of protocols I, II and III, in a completely randomized design. Protocol I (control) utilized 7mg/kg of lidocaine hydrochloride was applied on cornual nerve block. In protocol II the animals were submitted to the same procedure of protocol I plus IM application of 0.04mg/kg of xylazine. In protocol III the animals were submitted to the same procedures of protocols I and II plus the IM application of 1.1mg/kg of flunixin-meglumine. The behaviour was evaluated before and after dehorning. The difference between the vocalization during the dehorning procedure was significant (P=0.0229) between the protocols, with the frequency of PII being 70% and of the IP of 10% of the animals. In the post-dehorning period, there was a significant difference in animal behaviour of protocols II and III, which lay down less compared to protocol I. It was concluded that protocols II and III were more efficient in pain control, indicating that the use of sedative alone or associated with anti-inflammatory has contributed to improve animal welfare.
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Copyright (c) 2018 Jackson Barros do Amaral, Luciandra Macedo de Toledo, Luís Alberto Ambrósio, Flávia Augusta de Oliveira, Guilherme Trevisan
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