Objective To assess the effect of transportation stress on autonomic nervous function in beagle dogs based on heart rate variability(HRV) analysis,and define its recovery.Methods Sixteen beagle dogs were randomly di-vided into two groups(n = 8 in each): the control group and transportation stress group.Using a non-invasive telemetry system in conscious and unrestrained beagle dogs,electrocardiograms(ECG) were recorded in both groups after a 4 h transportation stress and after a recovery of 1,2 and 3 weeks.H...