Page 346 - The Welfare of Cattle
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                              Cow Comfort in Intensive and extensive
                                                       Dairy housing Systems



            Jesse Robbins
            Iowa State University
            Alex Beck
            Banks Veterinary Service


                                              CONteNtS

            Brief Overview of Common Dairy Housing Systems ...................................................................324
              Tie Stalls ....................................................................................................................................324
              Free Stalls ..................................................................................................................................324
              Other/Mixed Systems ................................................................................................................325
              Pasture-Based Systems ..............................................................................................................325
            Problem with System-Level Comparisons .....................................................................................326
            Leg Health: Lameness and Leg Injuries ........................................................................................326
            Mastitis ...........................................................................................................................................328
            Stocking Density, Grouping Strategy, and Feeding Behavior ........................................................329
            Thermal Stress ............................................................................................................................... 331
            Conclusions .................................................................................................................................... 332
            References ...................................................................................................................................... 333


               When many people think of dairy farming they imagine cows grazing on lush pastures (Cardoso
            et al., 2015). While grazing-based systems are common in many parts of the world (e.g., Oceania,
            Chile, Brazil), indoor, zero-grazing systems are much more common in most of the developed world
            (Barkema et al., 2015). Although there are many benefits associated with the shift to these more
            intensive systems, it is widely acknowledged they also come with numerous challenges for cattle
            welfare (Robbins et al., 2016). These include many traditional veterinary and animal science con-
            cerns such as high rates of disease, including lameness, mastitis, and other production diseases
            (Garry, 2004), but also increasingly negative public perceptions associated with a perceived lack of
            naturalness (Weary et al., 2016).
               In response, there is a growing focus on understanding how dairy cattle interact with their engi-
            neered environment in hopes of striking a more reasonable balance between the needs of people
            working on the farm and the needs of the cows. Much of this work has relied on merging the fields of
            veterinary medicine and ethology with aspects of facility design and management. Behavioral stud-
            ies often rely on paradigms that include observational and experimental preference and motivation


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