Table 5.

Mean fluid intakes of rams receiving either water or phenylthiocarbamide (PTC) during a test period for trial 1

	PTC concentration, mM						P values
Variable	0.20	0.56	1.57	4.39	12.29	Pooled SE	Treatment	Sequence	Period
Total test fluid intake as a percentage of total offered (1.5 kg water and 1.5 kg PTC solution)	60.9a	52.0a,b	51.2a,b	44.2b	40.7b	6.3	0.02	0.74	0.33
Water intake as a percentage of total test fluid intake	57.6a	64.5a,b	72.1b	88.4c	95.9c	5.0	0.0001	0.39	0.11
PTC solution intake as a percentage of total test fluid intake	42.4a	35.5a,b	27.9b	11.6c	4.1c	5.0	0.0001	0.39	0.11
Afternoon water intake as a percentage of total offered (9 kg)	92.5	91.4	91.6	89.5	92.9	3.2	0.61	0.68	0.03
Total fluid intake as a percentage of total fluid offered (12 kg)	84.6a	81.5b	81.5b	78.2c	79.9b,c	2.6	0.003	0.54	0.002

Treatment refers to PTC concentrations, sequence is the order PTC concentrations that were administered to rams, and period is the day PTC was administered within the sequence.

^a,b,cMeans with different superscripts within a response and across PTC concentrations are different (P ≤ 0.05).