GLAD Scale for Ranking Welfare of Horses on Arrival after Transport to Slaughterhouses.
Authors: Padalino Barbara, Benedetti Beatrice, Felici Martina, Bicout Dominique Joseph
Journal: Animals : an open access journal from MDPI
Summary
# GLAD Scale for Assessing Transport Welfare in Horses: A Framework for Informed Decision-Making at Slaughter Researchers developed the GLAD scale—categorising horses as Good shape, Light affected, Affected, or Down—to standardise welfare assessment at unloading after transport, addressing a significant gap in equine welfare measurement and regulation. Using 15 animal-based measures (ABMs) collected from 1019 horses, the team assigned weighted severity scores determined by animal welfare experts, with thresholds anchored to established indicators: the inability to stand and walk (Down category), injury presence (Affected threshold), and a calculated 20% of injury severity (Light affected threshold). The distribution revealed concerning findings: only 43% of horses arrived in good condition, whilst 48% showed light impairment, 9% exhibited significant welfare compromise, and 0.3% were non-ambulatory and legally unsuitable for transport. For practitioners, this scale offers a systematic tool to inform triage decisions—permitting immediate processing for fit animals, recommending rest for those showing light signs, flagging those requiring veterinary intervention, and identifying candidates for humane euthanasia—though the authors acknowledge the scale requires further validation before routine implementation. Given that nearly half the horses in this dataset showed measurable welfare impairment, the GLAD framework provides an evidence-based mechanism for identifying which animals have genuinely recovered from transport stress and which require additional welfare-focused management before processing.
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Practical Takeaways
- •Veterinarians at slaughterhouses can use this GLAD scale to systematically assess horse welfare on arrival and make evidence-based decisions about fitness for slaughter, rest requirements, or humane euthanasia
- •Nearly half of transport arrivals (48%) show light welfare impairment and would benefit from rest; identifying these horses early improves welfare outcomes
- •The scale is based on objective animal-based measures rather than subjective assessment, making it reproducible and legally defensible in regulatory contexts
Key Findings
- •A four-category welfare scale (GLAD) was developed using 15 animal-based measures from 1019 horses to classify welfare status at slaughter arrival
- •43% of horses were in good shape (G), 48% lightly affected (L), 9% affected (A), and 0.3% down/recumbent (D)
- •The scale uses weighted severity scores and three thresholds, with recumbency as the upper threshold and injuries as the intermediate threshold for welfare impairment classification
- •The GLAD scale provides veterinarians with a structured method to triage horses for immediate slaughter, rest, intervention, or euthanasia decisions