The calf is born immunocompetent but devoid of immunoglobulins (in cattle, they do not cross the placental barrier). The transfer of passive immunity between the cow and the young calf takes place after birth through colostral drunkenness. But this must be done as early as possible, before the closure of the intestinal barrier (36h).
We separately evaluate pro-oxidants and antioxidants. Thus by combining the two, it is possible to determine whether the oxidative stress is due to an increase in the production of oxygen radicals or a decrease in the ability to eliminate these oxygen radicals.