Table 11.

Purine derivatives:creatinine and urea:creatinine ratios obtained from spot collections after 2-h intervals

Item	Species		Days in feedlot				P value1
	Goat	Sheep	28	56	84	SEM	Species	DF	T	S × DF	S × T	DF × T	S × DF × T
PD:C2	1.86	3.74	3.85	2.32	2.24	0.81	<0.01	0.09	0.27	<0.01	0.58	0.93	0.91
U:C3	3.62	10.17	7.30	5.43	7.95	0.75	<0.01	<0.01	<0.01	<0.01	0.04	0.10	0.25

¹DF = days in feedlot; T = time of sampling; S × DF = interaction between animal species and days in feedlot; S × T = interaction between animal species and time of sampling; DF × T = interaction between days in feedlot and time of sampling; S × DF × T = interaction between species, days in feedlot and time of sampling.

²PD:C = purine derivatives:creatinine ratio.

³U:C = urea:creatinine ratio.