Table 3.

Animal mobility scores prior to and at harvest in steers fed lubabegron¹ for the final 56 d of the feeding period

Scoring location2	Mobility score3	Lubabegron dose, mg·kg−1 DM Percentage of steers				Ptrt4
		Control	1.5	3.5	5.5
Pen	1	86.3	85.0	85.9	86.9	0.793
	2	9.9	11.4	10.4	8.3	0.299
	>2	3.8	3.6	3.7	4.8	0.619
Loadout	1	74.6	76.6	73.7	71.3	0.170
	2	23.9	21.4	23.1	25.0	0.440
	>2	1.5	2.0	3.2	3.7	0.062
Lairage	1	82.7	80.2	81.7	80.9	0.644
	2	10.9	11.8	12.1	12.6	0.786
	>2	6.4	8.0	6.2	6.5	0.523

¹Experior, Elanco, Greenfield, IN, USA.

²Animal mobility assessments were conducted at: Approximately 1 wk prior to harvest while cattle were in their home pens (“Pen”), after collection of final pen weights and immediately prior to loading into trucks for slaughter (“Loadout”) and during antemortem inspection during lairage at the packing plant (“Lairage”).

³Cattle mobility was scored by trained observer using a 4-point scale from the North American Meat Institute (NAMI, 2015).

Score 1 = Normal, walks easily, no apparent lameness, no change in gait.

Score 2 = Exhibits minor stiffness, shortness of stride, slight limp, keeps up with normal cattle.

Score 3 = Exhibits obvious stiffness, difficulty taking steps, obvious limp, obvious discomfort, lags behind normal cattle.

Score 4 = Extremely reluctant to move even when encouraged by a handler, statue-like.

⁴Significant effect: P_trt ≤ 0.05.