Ferraro, A., Brunelli, R., Nelsen, S. L. et al. 2013. Making use of a laser pointer as training and enrichment tool: A discussion by the Laboratory Animal Refinement & Enrichment Forum. Animal Technology and Welfare 12, 195-196.
We have successfully trained with a laser pointer at least one cyno in each pair/group to target to their lixits. Currently this stands at about 35 cages housing a total of 63 animals. We no longer need to check the lixits with poles. Most of the animals no longer even need the laser and will check the lixit upon a verbal command and a simple hand gesture. It's fun to watch the animals as the technician goes around the room and all the animals are checking their lixits themselves.