Author: Cristina Campistol
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Book Description
Two experiments examined growth performance and physiological measures of stress in pre- and postweaned Angus steers (313 ± 24.5 kg; n = 48/Exp.), where steers were fitted with (YD) or without (ND) an anti-suckling device (Exp. 1), or provided (YS) or not provided (NS) a supplement (Exp. 2) for 7 d and weaned (d 7) by fenceline (FS) or total separation (TS). Steers in Exp. 1 were weighed and bled on d 0, 3, 7, 10, 14, 21, and 42, and in Exp. 2, on d 0, 7, 10, 14, and 21 and provided a supplement on d 7-21. In Exp. 1, weight gain was not different (P = 0.74) between ND and YD steers during preweaning. The YD-FS steers lost weight (P = 0.01) by d 10 compared with YD-TS steers. Hematocrit (Hct) increased (P = 0.04) in YD but not ND steers on d 3. Neutrophil:lymphocyte (N:L) ratio increased (P
The Effects of Weaning Strategy on the Physiology and Performance of Beef Calves
Author: Cristina Campistol
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Book Description
Two experiments examined growth performance and physiological measures of stress in pre- and postweaned Angus steers (313 ± 24.5 kg; n = 48/Exp.), where steers were fitted with (YD) or without (ND) an anti-suckling device (Exp. 1), or provided (YS) or not provided (NS) a supplement (Exp. 2) for 7 d and weaned (d 7) by fenceline (FS) or total separation (TS). Steers in Exp. 1 were weighed and bled on d 0, 3, 7, 10, 14, 21, and 42, and in Exp. 2, on d 0, 7, 10, 14, and 21 and provided a supplement on d 7-21. In Exp. 1, weight gain was not different (P = 0.74) between ND and YD steers during preweaning. The YD-FS steers lost weight (P = 0.01) by d 10 compared with YD-TS steers. Hematocrit (Hct) increased (P = 0.04) in YD but not ND steers on d 3. Neutrophil:lymphocyte (N:L) ratio increased (P
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
Book Description
Two experiments examined growth performance and physiological measures of stress in pre- and postweaned Angus steers (313 ± 24.5 kg; n = 48/Exp.), where steers were fitted with (YD) or without (ND) an anti-suckling device (Exp. 1), or provided (YS) or not provided (NS) a supplement (Exp. 2) for 7 d and weaned (d 7) by fenceline (FS) or total separation (TS). Steers in Exp. 1 were weighed and bled on d 0, 3, 7, 10, 14, 21, and 42, and in Exp. 2, on d 0, 7, 10, 14, and 21 and provided a supplement on d 7-21. In Exp. 1, weight gain was not different (P = 0.74) between ND and YD steers during preweaning. The YD-FS steers lost weight (P = 0.01) by d 10 compared with YD-TS steers. Hematocrit (Hct) increased (P = 0.04) in YD but not ND steers on d 3. Neutrophil:lymphocyte (N:L) ratio increased (P
The Effect of Early Weaning Beef Calves on Feedlot Performance, Carcass Characteristics, Cow Performance, and Economic Return
Author: Jennifer Marie Barker
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 226
Book Description
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 226
Book Description
An Evaluation of Weaning Strategies for Great Plains Cow-calf Producers
Author: Eric Arthur Bailey
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We evaluated effects of preconditioning on performance and health of beef calves raised and finished in the Great Plains. In experiment 1, calves were preconditioned for 0, 15, or 45 d and vaccinated against BRD-causing pathogens 14 d before maternal separation or after feedlot arrival. During receiving and finishing, preconditioned calves had greater DMI and ADG than non-preconditioned calves; however, timing of BRD vaccination did not affect animal health. In experiment 2, calves were vaccinated against BRD pathogens 0, 1, 2, or 3 times during a 30-d preconditioning program. Vaccination for BRD, regardless of degree, improved health during preconditioning; however, DMI, ADG, and G:F during preconditioning, receiving, and finishing were unaffected by degree of vaccination. In experiment 3, calves were preconditioned for 30 d, shipped 4 h to an auction facility, commingled for 12 h, and transported 4, 8, or 12 h to a feedlot. Feedlot performance and health of beef calves were not affected by transport of up to 12 h following auction-market commingling. In experiment 4, beef calves were subjected to 1 of 3 ranch-of-origin preconditioning programs: drylot weaning + abrupt dam separation, pasture weaning + fence-line contact with dams, and pasture weaning + fence-line contact with dams + supplemental feed delivered in a bunk. Drylot-weaned calves gained more weight during preconditioning. Unsupplemented, pasture-weaned calves had the least ADG during receiving but had greater ADG during finishing and had carcass characteristics similar to other treatments. In experiment 5, we evaluated performance of early-weaned beef calves fed grain-based diets with DMI adjusted to achieve ADG of 0.45, 0.91, or 1.36 kg/d during an 84-d growing period. Calves fed at restricted rates did not exhibit improved G:F relative to full-fed counterparts. In addition, there appeared to be limitations associated with predicting DMI and ADG of light-weight, early-weaned calves fed a grain-based diet.
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We evaluated effects of preconditioning on performance and health of beef calves raised and finished in the Great Plains. In experiment 1, calves were preconditioned for 0, 15, or 45 d and vaccinated against BRD-causing pathogens 14 d before maternal separation or after feedlot arrival. During receiving and finishing, preconditioned calves had greater DMI and ADG than non-preconditioned calves; however, timing of BRD vaccination did not affect animal health. In experiment 2, calves were vaccinated against BRD pathogens 0, 1, 2, or 3 times during a 30-d preconditioning program. Vaccination for BRD, regardless of degree, improved health during preconditioning; however, DMI, ADG, and G:F during preconditioning, receiving, and finishing were unaffected by degree of vaccination. In experiment 3, calves were preconditioned for 30 d, shipped 4 h to an auction facility, commingled for 12 h, and transported 4, 8, or 12 h to a feedlot. Feedlot performance and health of beef calves were not affected by transport of up to 12 h following auction-market commingling. In experiment 4, beef calves were subjected to 1 of 3 ranch-of-origin preconditioning programs: drylot weaning + abrupt dam separation, pasture weaning + fence-line contact with dams, and pasture weaning + fence-line contact with dams + supplemental feed delivered in a bunk. Drylot-weaned calves gained more weight during preconditioning. Unsupplemented, pasture-weaned calves had the least ADG during receiving but had greater ADG during finishing and had carcass characteristics similar to other treatments. In experiment 5, we evaluated performance of early-weaned beef calves fed grain-based diets with DMI adjusted to achieve ADG of 0.45, 0.91, or 1.36 kg/d during an 84-d growing period. Calves fed at restricted rates did not exhibit improved G:F relative to full-fed counterparts. In addition, there appeared to be limitations associated with predicting DMI and ADG of light-weight, early-weaned calves fed a grain-based diet.
Physiological Evaluation of Weaning Stress in Beef Calves
Author: Andrea R. Bueno
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 192
Book Description
Effects of Early Weaning of Fall Born Beef Calves on Preweaning and Postweaning Performance
Author: John Floyd Grimes
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 214
Book Description
A Comparison of the Effects of Three Different Weaning Methods on Performance and Behavior of Beef Calves
Author: Lucas P. Thompson
Publisher:
ISBN:
Category : Thesis
Languages : en
Pages : 90
Book Description
To assess the effects three different weaning methods have on beef calves' weight gain and behavior, 339 Angus and Angus-cross calves were weaned in 5 trials over 2 years. In each trial calves were equally divided into 3 weaning method treatments: traditional weaning, interval weaning, and fence-line weaning. Behavioral observations began on day 1 and continued to day 5 and included the observation of eating, drinking, walking, standing and lying down behaviors as well as the measurement of the amount of vocalizations emitted by each treatment group. Weights were obtained on days 0, 7, 14, and 28 and average daily gain (ADG) as well as cumulative weight gain was calculated for each period. Fence-line weaned calves vocalized more than interval weaned calves in the evenings (P = 0.02) but no other significant differences were seen. Interval weaned calves were observed eating more than traditionally weaned calves (P = 0.001). Fence-line calves did not differ from the other 2 groups in eating behavior. Traditionally weaned calves spent more time walking than interval weaned calves (P = 0.007). Fence-line weaned calves did not differ from traditionally weaned calves in walking behavior except on days 2 and 3 when they walked less (P = 0.0001 for day 2, P = 0.01 for day 3). Fence-line and interval weaned calves did not differ in walking behavior. Fence-line weaned calves spent more time lying down than traditionally weaned calves (P = 0.006) but no difference was seen between interval weaned calves and the other 2 groups. Fence-line weaned calves did not differ from the other 2 treatments for weight gain data. Interval weaned calves had a greater ADG on week 1 than traditionally weaned calves (P = 0.0003) but traditionally weaned calves had a greater ADG for week 2 than interval weaned calves (P = 0.002). For cumulative weight gain, interval weaned calves had greater weight gain than traditionally weaned calves for the 0 through 7 day period but weight gain did not differ between any of the three treatments for the 0 through 14 day period or the 0 through 28 day period. It was concluded that fence-line weaning provided minimal benefits to calf behavior during weaning and no benefits to weight gain compared to traditional weaning where as interval weaning provided benefits to behavior and weight gain during the first week of weaning compared to traditionally weaning making it a likely candidate to replace traditional weaning especially when calves are marketed the week after weaning occurs.
Publisher:
ISBN:
Category : Thesis
Languages : en
Pages : 90
Book Description
To assess the effects three different weaning methods have on beef calves' weight gain and behavior, 339 Angus and Angus-cross calves were weaned in 5 trials over 2 years. In each trial calves were equally divided into 3 weaning method treatments: traditional weaning, interval weaning, and fence-line weaning. Behavioral observations began on day 1 and continued to day 5 and included the observation of eating, drinking, walking, standing and lying down behaviors as well as the measurement of the amount of vocalizations emitted by each treatment group. Weights were obtained on days 0, 7, 14, and 28 and average daily gain (ADG) as well as cumulative weight gain was calculated for each period. Fence-line weaned calves vocalized more than interval weaned calves in the evenings (P = 0.02) but no other significant differences were seen. Interval weaned calves were observed eating more than traditionally weaned calves (P = 0.001). Fence-line calves did not differ from the other 2 groups in eating behavior. Traditionally weaned calves spent more time walking than interval weaned calves (P = 0.007). Fence-line weaned calves did not differ from traditionally weaned calves in walking behavior except on days 2 and 3 when they walked less (P = 0.0001 for day 2, P = 0.01 for day 3). Fence-line and interval weaned calves did not differ in walking behavior. Fence-line weaned calves spent more time lying down than traditionally weaned calves (P = 0.006) but no difference was seen between interval weaned calves and the other 2 groups. Fence-line weaned calves did not differ from the other 2 treatments for weight gain data. Interval weaned calves had a greater ADG on week 1 than traditionally weaned calves (P = 0.0003) but traditionally weaned calves had a greater ADG for week 2 than interval weaned calves (P = 0.002). For cumulative weight gain, interval weaned calves had greater weight gain than traditionally weaned calves for the 0 through 7 day period but weight gain did not differ between any of the three treatments for the 0 through 14 day period or the 0 through 28 day period. It was concluded that fence-line weaning provided minimal benefits to calf behavior during weaning and no benefits to weight gain compared to traditional weaning where as interval weaning provided benefits to behavior and weight gain during the first week of weaning compared to traditionally weaning making it a likely candidate to replace traditional weaning especially when calves are marketed the week after weaning occurs.
Effects of Weaning Date on Cow and Calf Performance
Author: Kellie Ann Chichester
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 126
Book Description
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 126
Book Description
Effect of Time of Weaning on Performance of Young and Mature Beef Cows and Their Calves in a Fall Calving System
Author: Melissa Dale Hudson
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Effect of Fenceline Contact at Weaning for Performance in Beef Calves in the Southwestern United States
Author: John Dugan Burgess
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 94
Book Description
This study examined fenceline contact between beef calves and cows at weaning and the subsequent comparisons for behavioral distress and related reductions in weight gain. Eighty-seven crossbred calves were randomly assigned to 3 treatment groups for eight weeks. Six replications were conducted to determine the effect of different weaning techniques on their subsequent growth while three replications were observed for behavioral differences. Treatments were 1) fenceline separation from dams for one week, 2) fenceline separation from dams for two weeks, and 3) total separation (abrupt weaning) from their dams. Calves were weighed on the day of weaning and at 7, 14, 35 and 56 days post-weaning. In the days following weaning, the one-week fenceline weaned calves spent more time eating (eating hay) than either the total separation or two week fenceline weaned treatments (P
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 94
Book Description
This study examined fenceline contact between beef calves and cows at weaning and the subsequent comparisons for behavioral distress and related reductions in weight gain. Eighty-seven crossbred calves were randomly assigned to 3 treatment groups for eight weeks. Six replications were conducted to determine the effect of different weaning techniques on their subsequent growth while three replications were observed for behavioral differences. Treatments were 1) fenceline separation from dams for one week, 2) fenceline separation from dams for two weeks, and 3) total separation (abrupt weaning) from their dams. Calves were weighed on the day of weaning and at 7, 14, 35 and 56 days post-weaning. In the days following weaning, the one-week fenceline weaned calves spent more time eating (eating hay) than either the total separation or two week fenceline weaned treatments (P
Effects of Early Weaning, Calf Removal and Body Condition on Reproductive Performance in Beef Cows
Author: Connie J. Neubauer
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 150
Book Description
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 150
Book Description