Table 2. Growth performance parameters of pigs in either control (CON) or sub-therapeutic chlortetracycline (sCTC; 40 ppm) treatments.

Item	CON1	sCTC1	SEM	P-value
Start body weight, kg	6.64	6.85	0.362	0.444
End body weight, kg	17.55	21.53	0.807	0.002
Day 0–14 ADG2, kg/d	0.05	0.16	0.028	0.013
Day 0–14 ADFI3, kg/d	0.19	0.25	0.054	0.051
Day 0–14 Gain:Feed	-0.24	0.15	0.449	0.115
Day 15–35 ADG2, kg/d	0.50	0.60	0.079	0.001
Day 15–35 ADFI3, kg/d	0.67	0.82	0.074	0.002
Day 15–35 Gain:Feed	0.65	0.50	0.228	0.252
Overall ADG2, kg/d	0.32	0.43	0.021	0.001
Overall ADFI3, kg/d	0.37	0.51	0.044	0.002
Overall Gain:Feed	0.88	0.85	0.096	0.617

¹Mean values are pig estimates (n = 12 pigs/treatment). Days 0–14 = Diet phase 1, days 15–35 = diet phase 2, and overall equates to days 0 to 35.

²ADG = Average Daily Gain

³ADFI = Average Daily Feed Intake