Table 4.

Diarrhea score and frequency of diarrhea of pigs fed diets without or with 150 mg Cu/kg (Exp. 1)¹

	Treatment
Item	Control	Cu2	SEM	P-value
Diarrhea score3
d 0 to14	2.3	2.0	0.11	0.076
d 14 to28	2.6	2.2	0.10	0.008
d 0 to 28	2.5	2.1	0.09	0.011
Frequency of diarrhea
d 0 to14
Pen days4	70	70
Frequency5	52.86	32.86	—	0.017
d 14 to28
Pen days4	70	70
Frequency5	55.71	27.14	—	<0.001
Overall, d 0 to 28
Pen days4	140	140
Frequency5	54.29	30.00	—	<0.001

¹Data are least squares means of 10 observations for all treatments.

²Cu from Cu hydroxychloride.

³Diarrhea score = 1, normal feces; 2, moist feces; 3, mild diarrhea; 4, severe diarrhea; 5, watery diarrhea.

⁴Pen days = number of pens × the number of days assessing diarrhea scores.

⁵Frequency = number of pen days with diarrhea.