Table 4.

Performance of beef cows receiving diets supplemented with CSSO (n = 52) or CON (n = 52) during the last trimester of gestation^1,2

Item	CON	CSSO	SEM	P-value =
Cow age, yr	5.33	5.39	0.41	0.93
Days receiving treatments, d	85.5	85.1	0.6	0.60
Gestation length, d	280	280	0.6	0.60
BW, kg
Initial (day −15)	504	505	9	0.89
Calving	545	554	9	0.48
Weaning (day 290)	568	564	9	0.78
BCS
Initial (day −15)	4.88	4.88	0.04	0.92
Calving	4.74	4.82	0.07	0.59
Weaning (day 290)	5.19	5.09	0.08	0.40

¹Cows received (dry matter basis) 195 g/cow daily of CSSO (Essentiom; Church and Dwight Co., Inc., Princeton, NJ) or 170 g/cow daily of CON (Energy Booster 100; Milk Specialties, Eden Prairie, MN). Treatments were provided from day 0 (day 195 of gestation) to calving.

²Unshrunk BW and BCS (Wagner et al., 1988) were recorded prior to the beginning of the experiment (initial; day −15), within 8 h after calving, and at weaning (day 290).