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The three–week period before and after calving is one of the most challenging times for dairy cattle because they must cope with physiological challenges such as decreased dry matter intake, impaired immune system function, and increased metabolic and systemic inflammation (Drackley, 1999; LeBlanc, 2010). After calving, inflammation has been documented in cattle (Bionaz et al., 2007; Huzzy et al., 2009). This suggests that cattle experience some degree of inflammation due to tissue damage associated with birthing and the immense metabolic demand associated with the onset of lactation (Bradford et al., 2015).
Raising heifers is one of the most cost-intensive areas of the farm. From the day these animals hit the ground until they calve, they are a monetary burden on the farm. Therefore, getting these animals to calving as efficiently as possible makes sense.
Blood samples obtained from calves is a common procedure can be very useful for a variety of reasons including testing for disease and determining the transfer of passive immunity. The quick and relatively simple method of taking blood samples can be low-stress and painless for both the animal and the individual. However, knowing where and how to place the need quickly to get a sample is important.
A sound colostrum management program should be the cornerstone to every farm’s calf management program. Calves are born with a naive immune system, one that does not have enough circulating antibodies to help fight disease. Because of this they are highly susceptible to disease for the first few weeks of life.