{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,18]],"date-time":"2026-09-18T00:14:13Z","timestamp":1789690453528,"version":"4.0.1"},"reference-count":18,"publisher":"Oxford University Press (OUP)","license":[{"start":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T00:00:00Z","timestamp":1785801600000},"content-version":"vor","delay-in-days":215,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,1,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Three randomized complete block design experiments evaluated a single implant strategy versus approved re-implant strategies in feedlot cattle using trenbolone acetate (TBA) and estradiol-based implants. Revalor implants were from Merck Animal Health; Synovex implants were from Zoetis. Exp. 1: A total of 1400 steers (initial BW = 320\u2009kg), housed in open lot, dirt-surfaced pens with a concrete apron, were assigned to either a single Revalor-XS (initial 80\u2009mg TBA + 16\u2009mg E2; delayed 120\u2009mg TBA + 24\u2009mg E2) administered 209 d pre-harvest (XS) or a re-implant strategy of Synovex-Choice (100\u2009mg TBA + 14\u2009mg EB) on d 0 followed by Synovex-ONE Feedlot (200\u2009mg TBA + 28\u2009mg EB) 60 d later (CHSOF). Pen served as the experimental unit. Initial BW differed and was included as a covariate. CHSOF increased (P\u2009=\u20090.01) DMI, and numerically increased ADG and HCW relative to XS, XS numerically improved net energy utilization by 2.27% (P\u2009\u2264\u20090.12). Exp. 2: Steers (n\u2009=\u2009480; initial BW = 388\u2009kg) were assigned to 48 open lot, dirt-surfaced pens with a concrete apron (10 steers\/pen). A 2\u2009\u00d7\u20093 factorial compared XS vs. CHSOF (re-implant at 70 d) across harvest times of 162, 183, or 204 DOF. Pen served as the experimental unit. Implant strategy had minimal effect on performance and carcass traits; increasing DOF increased (P\u2009\u2264\u20090.01) HCW, rib fat, and ribeye area. Exp. 3: Beef\u2009\u00d7\u2009Dairy heifers, (n\u2009=\u2009685) and steers (n\u2009=\u2009660; initial BW \u2248 167\u2013170\u2009kg) received CHSOF (d 100 and 200), CHPLUS (Choice d 200, Synovex Plus d 300), or Revalor strategies: XS (steers) or XH (heifers; lower estradiol dose) at d 100 (RevX100) or d 200 (RevX200). Cattle were hosued in open lot, dirt-surfaced pens with a concrete apron. Individual animal served as the experimental unit. RevX100 and RevX200 produced heavier (P\u2009\u2264\u20090.01) HCW than CHPLUS, while CHPLUS improved (P\u2009\u2264\u20090.01) yield grade. In conclusion, a single extended-release implant (Revalor-XS\/XH) performs comparably to Synovex re-implant programs in cattle finished over 200 to 400 DOF.<\/jats:p>","DOI":"10.1093\/tas\/txag117","type":"journal-article","created":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T12:02:09Z","timestamp":1785585729000},"source":"Crossref","is-referenced-by-count":0,"title":["Effect of single implant and re-implant strategies on growth performance and carcass characteristics in finishing cattle"],"prefix":"10.1093","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8804-8567","authenticated-orcid":false,"given":"Zachary K F","family":"Smith","sequence":"first","affiliation":[{"name":"Department of Animal Science, South Dakota State University , Brookings, SD 57007,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Becca G","family":"Francis","sequence":"additional","affiliation":[{"name":"Department of Animal Science, South Dakota State University , Brookings, SD 57007,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alyssa B","family":"Word","sequence":"additional","affiliation":[{"name":"Cactus Operating, LLC , Amarillo, TX 79101,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Audie","family":"Waite","sequence":"additional","affiliation":[{"name":"Agri Research Center, Inc , Canyon, TX 79015,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lee-Anne J","family":"Walter","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wade T","family":"Nichols","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jessica L","family":"Sperber","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marshall N","family":"Streeter","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brandon L","family":"Nuttelman","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Grant I","family":"Crawford","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John P","family":"Hutcheson","sequence":"additional","affiliation":[{"name":"Merck Animal Health , DeSoto, KS 66018,","place":["United States"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2026,8,3]]},"reference":[{"key":"2026091719561740600_txag117-B1","doi-asserted-by":"publisher","first-page":"470","DOI":"10.15232\/aas.2020-02116","article-title":"Effects of Revalor-XH, revalor-200, and combination Revalor-IH\/revalor-200 on yearling beef heifer growth performance and carcass characteristics for 138 days on feed","volume":"37","author":"Carlson","year":"2021","journal-title":"Appl. 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