Feed Lot

FEB 2018

Feedlots and cow/calf operations in the beef industry who feed 500 or more has annually on grains and concentrates; maintain 500 or more beef cows; backgrounder, stocker/grower, preconditioner; veterinarian, nutritionist, consultant

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.88 pounds in the on-arrival cattle. By 42 days, the on-arrival cattle had gained some ground but still were gaining 0.1 pounds less on average. After 42 days, there was virtually n o difference in BRD treatment c ost and no difference in death loss. Essentially all respiratory dis- ease happened in the first 14 days – the timing of the vaccine didn't change the overall morbidity, Van- der Ley said. Looking at IBR titers, the calves vaccinated on day 14 were substan- tially more prepared to respond to the vaccine than those vaccinated on arrival. "Those receiving the vaccine on arrival did not respond like we would hope," Vander Ley said. Other, larger study was conduct- ed and included an immunostimu- l a n t a n d m e t a p h y l a x i s i n t h e processing protocol. Although first treatment numbers were sim- ilar, the delayed treatment cattle showed a 4 to 5% decrease in BRD retreatment risk. "What we see in these studies is there is no harm in delaying the vaccination," said Vander Ley. De- laying vaccination until the calves are settled and stress is reduced did not impact morbidity. He said further studies have been conduct- ed and results are due to be pub- lished soon. "It's important to consider the stress level of these calves and their risk." FL FEED•LOT  February 2018 7 Courtesy of University of Nebraska-Lincoln E f f e c t o f B o v i n e R e s p i r a t o r y D i s e a s e ( B R D ) v a c c i n a t i o n t i m i n g o n p e r f o r m a n c e o f s t o c k e r c a t t l e d u r i n g t h e r e c e i v i n g p e r i o d . I t e m O n A r r i v a l 1 D e l a y e d 1 S E 2 P - v a l u e B W, l b 4 D a y 0 4 3 5 . 4 4 3 1 . 4 2 . 4 2 0 . 3 3 D a y 1 4 4 5 9 . 4 4 6 8 . 4 3 . 0 3 0 . 0 0 7 D a y 2 8 4 7 8 . 8 4 8 4 . 4 2 . 9 3 0 . 1 6 D a y 4 2 4 9 4 . 3 5 0 2 . 5 4 . 0 8 0 . 0 7 A D G , l b / d 3 D a y 0 t o 1 4 1 . 9 4 2 . 5 5 0 . 2 2 0 . 0 0 7 D a y 1 4 t o 2 8 1 . 3 4 1 . 1 7 0 . 1 5 0 . 4 5 D a y 2 8 t o 4 2 0 . 9 9 1 . 2 3 0 . 1 0 0 . 1 2 D a y 0 t o 4 2 1 . 4 3 1 . 6 5 0 . 0 9 0 . 0 5 P a s t u r e A D G , l b 4 1 . 9 6 1 . 8 5 0 . 0 8 0 . 1 5 1 Tr e a t m e n t s w e r e v a c c i n a t i o n o f i n c o m i n g s t o c k e r c a t t l e w i t h m o d i f i e d l i v e I B R , P I 3 , B R S V a n d B D V t y p e I a n d I I v a c c i n e e i t h e r o n a r r i v a l a t i n i t i a l p r o c e s s i n g ( d a y 0 ) o r o n d a y 1 4 . C a t t l e w e r e r e - v a c c i n a t e d d a y 1 4 f o l l o w i n g i n i t i a l v a c c i n a t i o n . 2 S t a n d a r d E r r o r o f t h e m e a n ( n = 5 2 4 ) . 3 A l l anal ysi s ( except day 0 B W ) w as conduct ed usi ng B W and gender on day 0 as covar i at es. 4 G r a z i n g p e r f o r m a n c e c a l c u l a t e d s u b s e q u e n t t o t h e d a y 4 2 r e c e i v i n g p e r i o d .

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