Involuntary culling is necessary to reduce suffering in individual animals, but a high proportion of involuntary culling in the herd indicates poor animal welfare and inefficient use of animal resources, which oppose sustainable dairy production. Moreover, involuntary culling has detrimental effects on farm economy; farmers should therefore strive for less involuntary culling to allow more voluntary culling (Weigel et al., 2003). Information about the main reasons for culling in organic production is limited. Rozzi et al. (2007) found that fertility and mastitis were the most common reasons for culling in organic herds in Canada, followed by feet and legs, and milk production. Fertility was also the main reason for culling in conventional herds, followed by low production and mastitis. In a Swedish study, the rate of culling due to mastitis was found to be similar in 26 organic herds and 1,102 conventional herds (Hamilton et al., 2006).