Hypocalcemia in bulls after EDTA infusion; variations among individuals

EDTA infusion on bulls is well suited to induce hypocalcemia. There exist individual differences in the bull's reaction to EDTA, and the bulls' degree of response is reduced by age. The response also differs from bull to bull when they are tested at different points in time. Health card recording conducted in Norway gives the possibility of estimating the heritability for various diseases. The reaction of the bulls to biological tests may also be compared to the daughters' resistance to various diseases. These experiments are conducted in the hope of finding some correlation between the bull's reactions on EDTA infusion and their daughters; resistance to paresis puerperalis.