The use of glucagon as a metabolic conditioner for dairy cows and other ruminants is described. The glucagon is preferably administered in an amount of from 1-10 mg per day, preferably during the time period beginning 7 days before calving and continuing until 21 days after calving. The administration of glucagon decreases the incidence of metabolic diseases and metabolic imbalances associated with fatty liver, allows cows to reach peak mile production sooner, and results in increased feed intake during the early stages of lactation.
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