Building on that, some battery powered GPS units these days are getting relatively cheap and can be used to stream location data. My guess would that in the eve

Building on that, some battery powered GPS units these days are getting relatively cheap and can be used to stream location data. My guess would that in the event of a disturbance, the horses would be much more active (moving around) more than one might expect? Integrated with the above; it strikes me that you need some 'disturbance-phenotype' to detect for. IE, you can get the data-loggers and instrumentation onto the beast, but then you need a way of defining 'disturbance'. Maybe once you've got that definition you can set up some spotlights to come on automatically once a certain level of 'disturbance' is met?