By John Yost and Greg Habing et.al
Livestock auctions are a cornerstone of local agricultural commerce. They are not just a place to buy and sell livestock but also serve as a point of access to the larger national marketplace for the local producer. Collectively, livestock auctions provide legal security for financial transactions. They also become the point of price discovery to determine the real value of the livestock marketed.
However, much like travelers in an airport, bringing together animals from many different locations can result in the spread of bacteria, viruses, and parasites. Additionally, the process of trucking animals to the facility, comingling them with animals from other locations, and then transporting them to their next destination creates stress that increases their susceptibility to new pathogens. This fact sheet provides general recommendations on the initial management of newly acquired livestock purchased from a local livestock auction. Included are specific recommendations for the different species of livestock/poultry may be implemented after consultation with your veterinarian.
Source : osu.edu