Yes. Both mains-powered and battery-powered electric fences pose a low risk to your ICD, because the electrical pulse is delivered very briefly — approximately once per second. If you accidentally touch an electric fence, the momentary shock will be startling but will not permanently damage your device. It may temporarily affect the pacing function of your ICD, but normal operation will resume once you move away.
Keep at least 30cm (12 inches) between your ICD and the fence wire and energiser unit when working near electric fencing.