Bovine Respiratory Disease: A Symposium
By Raymond W. Loan
Edition: 1st., 1984
ISBN-10 / ASIN: 0890961875
ISBN-13 / EAN: 978-0890961872
Many scientists feel that the old axiom of stress plus virus plus Pasteurella is still the etiology of shipping fever. I would like to propose to you today that the real etiology of shipping fever is the antiquated method we use to market calves. It has been estimated the average number of middlemen between the rancher and the consumer is about fifteen. Many calves, from the day they are removed from the dam (weaned) until they reach the feedlot, travel 800 to 1,000 miles and have seen more auction markets, truck rides and new country than the rancher who raised them. Then we ask ourselves after they have been through a journey such as this, why do they have respiratory disease and a 10 percent to 15 percent death loss? The question should be: why is the other 85 percent still alive?