Table 3.

Average velocity, frequency, and amplitude of cecal contractions in laying hens as measured in an organ bath according to their feather pecking (FP) phenotype (peckers: P, non-peckers: NP) and intraluminal stimuli treatment (Baseline: Krebs solution, L. rhamnosus: L. rhamnosus JB-1 dissolved in Krebs solution).

	FP phenotype			Luminal stimuli
	P birds	NP birds	P value	Baseline	L. rhamnosus	P value
Velocity (cm/s)	0.22 ± 0.04	0.26 ± 0.03	0.3958	0.24 ± 0.03	0.24 ± 0.03	0.9898
Frequency (Hz)	0.04 ± 0.006	0.04 ± 0.006	0.8049	0.06 ± 0.006	0.02 ± 0.006	< 0.001
Amplitude (cm)	0.05 ± 0.010	0.06 ± 0.010	0.4895	0.04 ± 0.007	0.07 ± 0.012	0.0579