ABSTRACT Lameness is a cause of worry to dairy producers for being indicative of welfare problem with resultant economic losses from reduced milk yield, veterinary cost or premature culling. Risks for lameness are both animal and herd level factors, but the magnitude varies with housing conditions of the cows. This study compared farmer estimated and observed prevalence, types of lameness, risk factors and economic losses from lameness of cows in farms practicing zero- and pasture grazing. T...