University of Idaho
MSE vs Rumensin + Tylan Finishing Trial

Control

MSE

R/T

R/T+MSE

SE

MSE vs R/T

No. of Head

23

24

24

23

No. of Reps

4

4

4

4

Begin WT

771.3

769.8

773.3

763.4

5.570

-3.5 Lbs

Carcass WT

753.8

757.0

745.0

741.6

12.8

+12.0 Lbs

125 DY WT

1,208.9

1,209.8

1,178.8

1,185.6

8.300

+31.0 Lbs

125 DY CONS*

24.26

21.89

20.96

22.44

0.320

+4.4%

125 DY ADG

3.58

3.60

3.32

3.45

0.040

+8.4%

125 DY F/G*

6.77

6.10

6.31

6.50

0.076

-3.4%

% Dress

62.00

62.00

61.99

62.00

0.003

0.00

% Choice

47.8

69.6

43.5

26.1

0.260

+60.0%

% No. 2 or Less

34.8

34.8

26.1

39.1

0.180

+33.3%

# No. 4's

1

1

0

0

* MSE, R/T Significantly Different than Control P<.04

These differences are similar to the increase in performance seen in the University of Nebraska trial, which showed significant (P<.02) differences in performance. Significant differences were not measured here because there were only four replications when six whould have been best.

MSE

Rumensin/Tylan

Carcass Return

$822/HD

$789/HD

Initial Cost

$493/HD

$495/HD

Cost of Gain

$217/HD
($0.494/CWT)

$208/HD
($0.515/CWT)

Profit/HD

$112.00

$86.00

Total Advantage $/HD = $26/HD
Considering conversion, final wt., and carcass quality.