Journal
FRONTIERS IN VETERINARY SCIENCE
Volume 8, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fvets.2021.651160
Keywords
animal welfare; eventing; Ulcer; BIT; horse
Categories
Funding
- Finnish Cultural Foundation (Pirkanmaa Regional Fund)
- Orion Research Foundation
- Finnish Foundation of Veterinary Research
- Finnish Veterinary Foundation (Mercedes Zachariassen Foundation)
- Juliana von Wendt Foundation
- SEY Animal Welfare Finland (Heli Castren grant)
- Doctoral School in Health Sciences, University of Helsinki
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The study looked at the prevalence of oral lesions and their risk factors in Finnish event horses. Thin and thick bits, as well as being a mare, were found to be risk factors for mouth lesions. Ponies had a smaller risk for lesions compared to other horse breeds. Monitoring the bit area and considering these risk factors is important for horse welfare.
Bit-related oral lesions are common and may impair horse welfare. The aim of this study was to investigate the prevalence of oral lesions and their risk factors in a sample of Finnish event horses. The rostral part of the oral cavity (the bit area) of 208 event horses (127 warmbloods, 52 coldbloods, and 29 ponies) was examined in a voluntary inspection after the last competition phase, i.e., the cross-country test. Acute lesions were observed in 52% (109/208) of the horses. The lesion status was graded as no acute lesions for 48% (99/208), mild for 22% (45/208), moderate for 26% (55/208) and severe for 4% (9/208) of the horses. The inner lip commissure was the most common lesion location observed in 39% (81/208) of the horses. A multivariable logistic regression model with data of 174 horses was applied to risk factor analysis. Horses wearing thin (10-13 mm) (OR 3.5, CI 1.4-8.7) or thick (18-22 mm) (OR 3.4, CI 1.4-8.0) bits had a higher risk of moderate/severe lesion status than horses wearing middle-sized (14-17 mm) bits (P = 0.003). Breed was associated with moderate/severe lesion status (P = 0.02). The risk was higher for warmbloods (reference group) and coldbloods (OR 2.0, CI 0.88-4.7) compared with ponies (OR 0.2, CI 0.04-0.87). Mares were at higher risk of moderate/severe lesion status (OR 2.2, CI 1.1-4.5) than geldings (reference group) (P = 0.03). Bar lesions were more common in horses with unjointed bits (40%, 8/20) than with basic double-jointed (10%, 5/52), formed double-jointed (8%, 6/78) or single-jointed bits (5%, 2/40) (Fisher's exact test, P = 0.002). The results of this study suggest that thin and thick bits and mare sex should be considered risk factors for mouth lesions. In addition, in this sample ponies had smaller risk for lesions than other horse breeds. We encourage adopting bit area monitoring as a new routine by horse handlers and as a welfare measure by competition organizers for randomly drawn horses.
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