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  1. Article ; Online: The effect of different implant programs on beef × dairy steer feedlot growth performance and carcass characteristics.

    Wesley, K R / Word, A B / Maxwell, C L / Holland, B P / Karr, K J / Hutcheson, J P / Walter, L A J / Johnson, B J

    Translational animal science

    2023  Volume 7, Issue 1, Page(s) txad124

    Abstract: The objective of this study was to evaluate potency and timing of trenbolone acetate ( ...

    Abstract The objective of this study was to evaluate potency and timing of trenbolone acetate (
    Language English
    Publishing date 2023-11-11
    Publishing country England
    Document type Journal Article
    ISSN 2573-2102
    ISSN (online) 2573-2102
    DOI 10.1093/tas/txad124
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The effect of days on feed and zilpaterol hydrochloride supplementation on feeding behavior and live growth performance of Holstein steers.

    Walter, L-A J / McEvers, T J / May, N D / Reed, J A / Hutcheson, J P / Lawrence, T E

    Journal of animal science

    2016  Volume 94, Issue 5, Page(s) 2139–2150

    Abstract: This experiment was designed to study the effect of days on feed (d 225-533) and zilpaterol hydrochloride (ZH) supplementation on Holstein steer ( = 110) performance and feeding behavior as part of a serial slaughter trial. Steers were randomly assigned ... ...

    Abstract This experiment was designed to study the effect of days on feed (d 225-533) and zilpaterol hydrochloride (ZH) supplementation on Holstein steer ( = 110) performance and feeding behavior as part of a serial slaughter trial. Steers were randomly assigned to 1 of 11 harvest groups with 10 steers ( = 5 control and = 5 ZH; ZH at 8.33 mg/kg diet) harvested each 28 d. Steers were weighed every 28 d (d 225, 253, 281, 309, 337, 365, 393, 421, 449, 477, 505, and 533); individual daily meal consumption data for each steer were recorded using GrowSafe technology. In the pretreatment period, dry matter intake expressed a negative quadratic relationship with days on feed (DOF) {DMI = -5.7120 + (0.08370 x DOF)- (0.00011 x DOF); Adj. = 0.2574; RMSE = 0.25 75; 0.01}. A linear increase in BW ( < 0.01) occurred during the pretreatment 308 d period from 466 to 844 kg, {BWend = 137.61 + (1.4740 x DOF); Adj. = 0.8819; RMSE = 37.06; < 0.01}, whereas ADG and G:F decreased linearly. Dry matter intake per meal exhibited a quadratic relationship over days on feed and peaked ( < 0.01) during d 365 to 392 at 1.065 kg coinciding with the highest numerical daily DMI (11.19 kg). Daily consumption visit duration differed ( < 0.01) during the 308 d period, with a low of 52.29 min (d 337-364) and a high of 55.59 min (d 365-392). Consumption rate peaked at 714 g/min (d 337-364) and exhibited a quadratic relationship to DOF. The difference ( < 0.04) in DMI between control and ZH treated cattle across all 11 harvest groups averaged 0.575 kg. Moreover, ZH treatment resulted in decreased ( 0.01) DMI per meal event of 0.093 kg. Gain to feed tended to improve ( = 0.06) with ZH treatment by 0.017 kg gain per kg feed relative to the control cattle. Daily bunk, consumption, and meal visit durations were influenced by ZH during the 20 d treatment period ( = 0.01); the average difference between control and ZH supplemented cattle over the 308 d trial was 9.09, 8.71, and 11.39 min per d, respectively. The data collected in this trial indicate live growth performance and feeding behavior were impacted by both DOF and ZH supplementation.
    MeSH term(s) Animal Feed/analysis ; Animal Nutritional Physiological Phenomena ; Animals ; Body Composition/drug effects ; Cattle/growth & development ; Cattle/physiology ; Diet/veterinary ; Dietary Supplements ; Feeding Behavior/drug effects ; Male ; Trimethylsilyl Compounds/administration & dosage ; Trimethylsilyl Compounds/pharmacology ; Weight Gain/drug effects
    Chemical Substances Trimethylsilyl Compounds ; Zilpaterol
    Language English
    Publishing date 2016-05
    Publishing country United States
    Document type Journal Article ; Randomized Controlled Trial
    ZDB-ID 390959-1
    ISSN 1525-3163 ; 0021-8812
    ISSN (online) 1525-3163
    ISSN 0021-8812
    DOI 10.2527/jas.2015-0012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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