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Research article - Peer-reviewed, 2022

Limited Effects of Pain Control Treatments on Behaviour and Weight Gain of Pure and Crossbred Nellore Heifer Calves When Subjected to Hot-Iron Branding

Hernandez, Adalinda; Esteves Trindade, Pedro Henrique; Rodrigues Paranhos Da Costa, Mateus Jose; Jung, Jens; Berg, Charlotte

Abstract

Simple Summary This study investigated the effects of pain relief treatments on behaviour and weight gain in 92 Nellore and crossbred (F1 Aberdeen Angus x Nellore) heifer calves (aged around 120 days) subjected to hot-iron branding on the cheek after vaccination against brucellosis. Four treatments were compared: Control (CO, no pain relief); local anaesthesia (LA, subcutaneous anaesthetic); analgesic (LT, intramuscular meloxicam); and local anaesthetic and analgesic (LL, both local anaesthesia and meloxicam). Calves in treatments CO and LT were subjected to face manipulation simulating application of local anaesthetic without introducing the needle. Facial and body expressions, flight speed, and body weight were recorded before, during, and five (5-d) and 60 days (60-d) after hot-iron branding. No effect of pain relief was observed for most calves studied. The only difference observed was higher tension ('tense') at 5-d in CO calves. All calves showed fear and stress responses during restraint and hot-iron branding, which probably masked pain responses. In conclusion, hot-iron facial branding impoverishes calf welfare and, due to the additional handling involved, adoption of a pain relief protocol is not an efficient way to minimise welfare impacts. Hot-iron branding is still commonly performed in cattle farming in tropical countries, and possibly has negative consequences for animal welfare and weight gain. This study examined the behavioural and weight gain responses of pure and crossbred Nellore heifer calves subjected to hot-iron branding on the cheek, without and with use of anaesthesia and analgesia. Ninety-two heifer calves, around 120 days old, were studied prospectively when subjected to hot-iron branding on the cheek (a statutory procedure in Brazil following brucellosis vaccination). Four randomly selected groups of calves were allocated to four treatments: no pain control (CO); subcutaneous anaesthetic local block (LA); intramuscular analgesia (meloxicam) (LT); and local anaesthesia plus meloxicam (LL). Behaviour, flight speed and body weight were evaluated before, during, and five (5-d) and 60 days (60-d) after branding. For these parameters, the only difference observed was higher tension in the CO group 5-d post-branding, suggesting a short-term negative effect of branding without pain control. The limited effects of the pain control treatments suggest interference in pain assessment by other factors, such as expression of fear and stress. Despite the lack of differences observed in behaviour and production parameters, facial hot-iron branding is an obvious welfare issue and, due to the additional handling involved, adoption of a simple pain relief protocol is not sufficient to minimise the welfare impact.

Keywords

animal welfare; Bos indicus; cattle; facial expression; pain assessment; qualitative behavioural assessment; weight gain

Published in

Animals
2022, volume: 12, number: 22, article number: 3143
Publisher: MDPI

Authors' information

Swedish University of Agricultural Sciences, Department of Animal Environment and Health
Esteves Trindade, Pedro Henrique
Universidade Estadual Paulista
Rodrigues Paranhos Da Costa, Mateus Jose
Universidade Estadual Paulista
Swedish University of Agricultural Sciences, Department of Animal Environment and Health
Swedish University of Agricultural Sciences, Department of Animal Environment and Health

UKÄ Subject classification

Clinical Science

Publication Identifiers

DOI: https://doi.org/10.3390/ani12223143

URI (permanent link to this page)

https://res.slu.se/id/publ/120441