"The big steers I sell get no medication whatever. When they hit the feedlot they'll get it all, so why vaccinate?..."
I guess the reason I would like to see calves vaccinated before they leave the farm is that it takes 2 - 3 weeks for an immune response to develope even minimally. Maximum response is developed following a booster shot about six weeks after the initial one. Those first couple of weeks after weaning and on entering a feedlot are when they need the protection.
In addition, there is some evidence that already stressed calves such as those newly weaned will not respond normally to the vaccine challenge.
Of course, this in no way changes the fact that you are not getting paid for doing the right thing.
I guess the reason I would like to see calves vaccinated before they leave the farm is that it takes 2 - 3 weeks for an immune response to develope even minimally. Maximum response is developed following a booster shot about six weeks after the initial one. Those first couple of weeks after weaning and on entering a feedlot are when they need the protection.
In addition, there is some evidence that already stressed calves such as those newly weaned will not respond normally to the vaccine challenge.
Of course, this in no way changes the fact that you are not getting paid for doing the right thing.
Comment