Table 4.
Performance parameters of feedlot cattle supplemented with an immunomodulatory feed ingredient (SUPP; n = 8) or not (CON; n = 8) during a 106-d finishing period1
| Item | CON | SUPP | SEM | P-value |
|---|---|---|---|---|
| Body weight parameters2 | ||||
| Initial (day 0), kg | 441 | 440 | 3 | 0.85 |
| Final (day 106), kg | 572 | 569 | 4 | 0.51 |
| Average daily gain, kg | 1.24 | 1.21 | 0.02 | 0.31 |
| Feed intake (DM),3 kg/d | 9.54 | 9.15 | 0.40 | 0.50 |
| Feed efficiency,4 g/kg | 132 | 133 | 4 | 0.93 |
1From day 7 to 106 of the experiment, 56 g/animal daily (as-fed basis) of Omnigen-AF (Phibro Animal Health, Teaneck, NJ) was mixed with the total mixed ration (TMR) of SUPP cow at 0700 h.
2Body weight was recorded prior to the first TMR feeding of the day, and ADG was calculated using initial and final weights.
3Feed intake was assessed by recording daily TMR offer, and collecting the nonconsumed TMR on day 14, 28, 42, 56, 70, 84, 98, and 106. Daily TMR intake of each pen was divided by the number of sampling days and cattle within each pen.
4Feed efficiency was calculated using total body weight gain (in grams) and total intake of the total mixed ration (in kg of DM) of each pen during the experimental period.