Evaluating the utility of a CO2 surgical laser for piglet tail docking to reduce behavioral and physiological indicators of pain and to improve wound healing: A pilot study

Lou, Maria E; Kleinhenz, Michael D.; Schroeder, Robin; Lechtenberg, Kelly F.; Montgomery, Shawnee; Coetzee, J. F.; Viscardi, Abbie V.

doi:10.1016/j.applanim.2022.105720

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…[24] Walking Moving forward at a regular pace. [29] Ataxia Uncoordinated walking with exaggerated lateral movement or fluttering when standing to maintain posture. [10] Deep inhalation Wide open-mouth breathing with neck extension.…”

Section: Standingmentioning

confidence: 99%

Alternatives to Carbon Dioxide in Two Phases for the Improvement of Broiler Chickens’ Welfare during Stunning

Rucinque,

Velarde,

Xercavins

et al. 2024

Animals

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This study evaluated the exposure to gas mixtures of carbon dioxide (CO2) associated with nitrogen (N2) as alternatives to CO2 in two phases to improve the welfare of broiler chickens at slaughter. Broilers were exposed to one of three treatments: 40C90C (1st phase: <40% CO2 for 2 min; 2nd phase: >90% CO2 and <2% O2 for 2 min, n = 92), 40C60N (40% CO2, 60% N2, and <2% O2 for 4 min, n = 79), or 20C80N (20% CO2, 80% N2, and <2% O2 for 4 min, n = 72). Brain activity (EEG) was assessed to determine the onset of loss of consciousness (LOC) and death. Behavioural assessment allowed for characterisation of an aversive response to the treatments and confirmed loss of posture (LOP) and motionlessness as behavioural proxies of LOC and brain death in 40C60N and 20N80C. However, the lack of quality of the EEG traces obtained in 40C90C did not allow us to determine the onset of LOC and brain death for this treatment. The onset of LOC in 40C60N was found at 19 s [14–30 s] and in 20C80N at 21 s [16–37 s], whereas a LOP was seen at 53 s [26–156 s] in 40C90C. Birds showed brain death in 40C60N at 64 s [43–108 s] and in 20C80N at 70 s [45–88 s]), while they became motionless in 40C90C at 177 s [89–212 s]. The 40C90C birds not only experienced more events of aversive behaviours related to mucosal irritation, dyspnoea, and breathlessness during induction to unconsciousness but were at risk of remaining conscious when the CO2 concentration was increased in the 2nd phase (known to cause severe pain). From an animal welfare point of view, 40C60N proved to be the least aversive of the three treatments tested, followed by 20C80N and 40C90C.

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Section: Standingmentioning

confidence: 99%

Alternatives to Carbon Dioxide in Two Phases for the Improvement of Broiler Chickens’ Welfare during Stunning

Rucinque,

Velarde,

Xercavins

et al. 2024

Animals

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“…[26] Walking Moving forward to explore the area. [27] Ataxia Uncoordinated walking with exaggerated lateral movement or as the use of wing when standing to maintain posture.…”

Section: Standingmentioning

confidence: 99%

Alternatives to the Use of Carbon Dioxide in Two Phases for the Stunning of Broiler Chickens at Slaughter

Rucinque,

Velarde,

Xercavins

et al. 2023

Preprint

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This study evaluated gas mixtures of carbon dioxide (CO2) associated with nitrogen (N2) as al-ternatives to the use of CO2 in two phases to improve the welfare of broiler chickens at slaugh-ter. Broilers were exposed to one of three treatments: 40C90C (1st phase: <40% CO2 for 2 min; 2nd phase: >90% CO2 and <2% O2 for 2 min, n=92), 40C60N (40% CO2, 60% N2 and <2% O2 for 4 min, n=79), or 20C80N (20% CO2, 80% N2 and <2% O2 for 4 min, n=72). The time to onset of loss of consciousness (LOC) and death was assessed by brain activity (EEG) and behaviour. Behaviour also allowed characterisation of the aversive response to the treatments. Exposure to 40C60N and 20C80N induced LOC faster (19 s [14 – 30 s] and 21 s [16 – 37 s], respectively) but also with less inter-individual variability compared to 40C90C (53 s [26 – 156 s], P < 0.001) and birds took less time to die (40C60N: 64 s [43 – 108 s]; 20C80N: 70 s [45 – 88 s]; 40C90C: 177 s [89 – 212 s], P < 0.001). The 40C90C birds not only experienced more aversion during induction to LOC but are at risk of remaining conscious when the CO2 concentration is increased in the 2nd phase. From an animal welfare point of view, 40C60N provided the highest welfare, followed by 20C80N and 40C90C.

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“…With some animals in our care, there are management procedures that can be painful, and research has been conducted to determine ways to minimise this suffering. Lou et al (2022) reported on a pilot study to evaluate the effectiveness of a CO2 laser which caused less tissue damage, inflammation and pain in comparison to the conventional method of pliers. In cattle, Thomas et al (2022) assessed pain responses from digital dermatitis lesions using locomotion scores, mechanical nociceptive thresholds, and thermal imaging.…”

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confidence: 99%

Preface for the special issue of the 54th international congress of the ISAE

Campbell

Kamboj

Singh

et al. 2023

Applied Animal Behaviour Science

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Evaluating the utility of a CO2 surgical laser for piglet tail docking to reduce behavioral and physiological indicators of pain and to improve wound healing: A pilot study

Cited by 3 publications

References 36 publications

Alternatives to Carbon Dioxide in Two Phases for the Improvement of Broiler Chickens’ Welfare during Stunning

Alternatives to Carbon Dioxide in Two Phases for the Improvement of Broiler Chickens’ Welfare during Stunning

Alternatives to the Use of Carbon Dioxide in Two Phases for the Stunning of Broiler Chickens at Slaughter

Preface for the special issue of the 54th international congress of the ISAE

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