months of age, right before bulls are turned out for the start of a controlled breeding season. “Since that’s the first dose of
vaccine that these calves see, that would become their priming dose with revaccination around wean- ing. Any vaccines given at branding should be boostered at 6 to 7 months of age or at weaning,” he says. “Starting at branding basically
sets the stage for when that calf is going to get vaccinated later in life, with the timing coinciding to when they’re going to get exposed to diseases.”
Other factors affecting a calf’s immunity There are other factors that may
affect a spring born calf’s immunity during the warm months of the year. In late summer the animal may suffer trace mineral defi cien-
cies and reduced nutrition from declining grass quality. Since these shortfalls are oc-
curring at about the same time the maternal antibodies are disappear- ing, the calf’s immune system may not be working at its best. “Because this tends to happen
year after year regardless of drought conditions, branding vaccination followed by fall booster are pretty standard and mandatory to get the best bang for your buck from the vaccines,” Spire says. In some cases, the booster to the
vaccine that was applied at branding is applied about 2 weeks later and before weaning. That provides an opportunity for antibodies to build up in the calf prior to weaning. Among the boosters that are
typically applied at that time are vaccinations against viral infections and blackleg. The calf can also re-
ceive the fi rst inoculation against P. multicida. In addition, says Spire, “It’s a
pretty safe time to do it while the calves are on the mama cows. If we vaccinate the mama cows rou- tinely, we certainly minimize any concerns about any side effects from the vaccines, while it gives that calf a chance to go back onto Mom and nurse. It’s in a good environment and we don’t put a lot of undue stress on them.” The boosters can then be ap-
plied at or around the time of wean- ing. This more robust approach to vaccination will help calves better deal with stress of weaning and as they’re coping with transfer of ownership and the move to another ranch.
Know your vaccines Knowing your vaccines is criti-
Think what this breeding can do for you!
Grand Champion Heifer flushed to Grand Champion Bull! Embryos for sale next year.
Cattle for sale
at all times!
For more information contact:
TRIPLE RANCH • Registered Black Herefords •
tscra.org Bobby & Jared Lide
714 FM 1366 • Mexia, TX 76667 254-739-5311
Bobby (Cell) 254-625-3800 Jared (Cell) 254-625-3806
www.triplelblackherefords.com May 2014 The Cattleman 57
Grand
Champion Female
at the First Black Hereford Show
March 7 Alvarado, Texas
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