Automatic and permanent rodent-monitoring - a proper method to evaluate rodenticide effects?

During an evaluation trial to test the efficiency of a rodenticide product we compared the standard feeding census method with a new activity monitoring tool. This tool uses wireless motion sensors to register movements of free ranging rats or mice. With both methods a survival rate after the treatment was calculated and the results (less than 3% survival) matched closely. The permanent monitoring, however, gave an additional benefit as the animal behavior could be observed throughout the whole trial, especially the time delay between treatment and effect.