Economic impact of preweaning vaccinations on health and performance of weaned feeder cattle
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Abstract
In October, 1995, 3,565 head of freshly
weaned, British-breed calves were received into
a weaning facility in southwest Nebraska.
Calves were determined to be preconditioned if
they had received both viral an d Pasteurella
vaccines prior to weaning (PREWEAN; n =
2,315), and all other calves were considered to
have no preconditioning (CRTL; n = 1,250).
Cattle were processed within 24 hours of
arrival, and booster vaccinations were given
when appropriate. Average days on feed at the
weaning facility were similar between
PREWEAN and CTRL calves (52.4 and 50.3
days, respectively), but average daily gain (2.24
vs 1.87 kb) and cost per lb of gain (