Lameness on Brazilian pasture based dairies-part 1: Farmers' awareness and actions.

This cross-sectional survey aimed to verify farmers' awareness and knowledge about lameness in grazing dairy cows and to analyze their perspectives and actions intended to control this issue. Farms (n = 44, mean herd size: 42, SD = 11.2) located in southern Brazil were visited twice in 2015. On the first visit the farmers were requested to answer a questionnaire on lameness knowledge (relative importance as a health issue, aetiology, impacts on culling) and management (prevention, treatment and veterinary assistance) on their farms. Farmers were asked to estimate the number of lame cows present on their farms at each visit. All lactating cows on each farm were locomotion scored by a veterinarian to estimate lameness prevalence on both visits. Intra-class correlation coefficients (ICC) were used to test similarity between the veterinarian and farmer estimated lameness prevalence. Mixed-effects linear models were fitted to investigate the associations between veterinarian lameness estimated prevalence and farmers' answers regarding lameness importance and impacts on culling cows at the farms. On average, farmers underestimated lameness prevalence during both visits; however, when assessing only severe lameness, veterinarian and farmer prevalence lameness ratings were very similar on the second visit (ICC 0.8, 95% CI: 0.6-0.9, n = 43, P < 0.01). The veterinarian's estimated lameness prevalence was about 10% higher on herds where farmers identified lameness as a primary health issue (40.24%) or as a reason for culling (41.7%) versus farms where the farmer did not recognize lameness as a health concern or reason for culling. Farmers' most reported causes of lameness on their farms were categorized as hoof trauma, inadequate feeding practices associated with acidosis-laminitis, high moisture on walking surfaces, and individual features of cows. Farmers mentioned frequently that they made use of antibiotics and topical hoof products to treat lame cows; they also reported low use of anti-inflammatories/analgesics and hoof trimming as treatment remedies and no one mentioned adoption of regular preventative measures for lameness. Farmers reported having no training on lameness management, and cited an overall lack of veterinary support to control lameness on their farms. The farmers seemed unaware of the extent of lameness on their farms. Interventions aimed at reducing lameness in small scale herds in this region of Brazil should include a preventative veterinary assistance approach focused, initially, to increase farmers' knowledge and awareness on lameness.