Several bulls in Sweden are culled because of lameness. Studies of beef bulls have shown that osteochondrosis is an important underlying cause of hind limb problems (Persson, 2003; Dutra, 1998). Osteochondrosis in horses, dogs, swine, poultry and man are well documentated in the literature, but there are few studies in cattle. The prevalence of osteochondrosis in dairy bulls in Sweden is unknown. The aim of this study was to investigate the presence and localisation of osteochondrosis in the hindlimbs of dairy bulls. This study consists of 48 one-year-old bulls divided into four groups related to which farm they came from.

The top selection of Swedish beef bulls are evaluated yearly by Svensk Köttrasprövning AB at Gismestad. The bulls are selected from six different breeds; Angus, Blonde d´Aquitaine, Charolais, Hereford, Limousin and Simmental, and are kept on straw bedding apart from a concrete alley in front of the feeding area during the six months of evaluation period. The bulls are evaluated according to their fertility scores, growth, exterior and temperament and the exterior, body posture and claw conformation reflect important qualities for their longevity. In spite of good values for fertility, it has been noticed in the last years that the fertility results and longevity have been unsatisfactory and claw and/or bone disorders have been suspected as a contributory cause. Persson et al. (2007) studied breeding bulls from Gismestad and other places, which had been slaughtered due to poor fertility (no pregnancies in the herd during their last year in service).

Trots mångåriga ansträngningar och även om relativt många hundar röntgas i Sverige idag, så orsakar armbågsleds- och höftledsdysplasi fortfarande stora problem inom många hundraser, t ex labrador retriever. Armbågsledsdysplasi (AD) och höftledsdysplasi (HD) klassificeras som utvecklingsrubbningar. Armbågsledsdysplasi (AD) är ett samlingsbegrepp för sådana förändringar i leden som redan hos den unga individen kan leda till osteoartros (OA). Armbågsledsartros innebär en onormal förslitning av ledbrosket i armbågsleden vilket ger upphov till benpålagringar. Olika typer av tillväxtrubbningar i och runt leden är orsak till förslitningen av ledbrosket och de senare uppkomna pålagringarna.