I am looking to replace a silent herdsman heat detection system and would like to know what people think of the various systems that are available at the moment. I like the silent herdsman system apart from having reliability issues with the collars. So far I have looked at Genus breeder tag, SCR Sense time and Wordwide sires cow manager ear tags. I would particular be interested to here from anyone that has changed from collars to either ear tags or pedometers and how they compare to collars for easy of use.