PSVII-14 Performance and health responses of feedlot cattle consuming different feed additives during a 45-day receiving period Conference Paper uri icon

abstract

  • Abstract This experiment compared performance and health responses of feedlot cattle consuming different feed additives during a 45-d receiving period. Angus-influenced steers (n = 256) were purchased from a commercial auction yard, and road-transported (12 h) to the experimental feedyard on d -1. Upon arrival, body weight (BW) was recorded and steers were ranked by BW into 1 or 18 drylot pens (14 or 15 steers/pen). Pens were randomly assigned to receive RAMP from d 0 to d 45 with the inclusion of: 1) Rumensin + Tylan (Elanco Animal Health; Greenfield, IN; 360 mg and 90 mg per animal/daily, respectively; RT), 2) Rumensin + Celmanax + Certillus (Church and Dwight Co., Inc., Princeton, NJ; 18 g and 28 per animal/daily, respectively; RCC), or Celmanax + Certillus (18 g and 28 per animal/daily, respectively; CC). Feed intake during the initial 21 d of the experiment was greater (P 0.05) in CC vs. RCC and RT. No treatment effects were detected for steer BW gain and feed efficiency (P 0.41). Total incidence of steers treated for respiratory disease did not differ between treatments (77.9, 82.3, and 80.0%, respectively, P = 0.77). Removal of steers from the experiment due to extreme morbidity of mortality was greater (P = 0.02) in RT vs. CC, and intermediate for RCC (22.4, 7.0, and 12.9%, respectively). Accordingly, total liveweight per pen on d 45 was greater (P 0.05) for CC and RCC vs. RT (3.79, 3.61, and 3.20 ton, respectively). Inclusion of CC into a receiving diet improved initial feed intake compared with ionophore-containing diets, but without changing steer performance. Moreover, CC and RCC resulted in improved health responses during the 45-d receiving period compared with the traditional RT receiving diet. These results suggest that CC ingredients improved intake and immunocompetence of receiving cattle.

published proceedings

  • Journal of Animal Science

author list (cited authors)

  • Colombo, E., Cooke, R. F., Brando, A., Wiegand, J., Schubach, K., Sowers, C. A., Duff, G., & Gouvea, V. N.

citation count

  • 0

complete list of authors

  • Colombo, Eduardo||Cooke, Reinaldo F||Brandão, Alice||Wiegand, Jacob||Schubach, Kelsey||Sowers, CiCi A||Duff, Glenn||Gouvea, Vinicius N

publication date

  • January 2020