Not sure that I'm too keen on the idea. I don't like the thought of confining social creatures in separate compartments, and calling the thing a "cassette" rather divorces it from any sense of it containing a living being
Some were 'trained' to forage near to explosives chemicals and then tried as indicators for land mines. Not sure if it worked out but must have been more than 5 years ago when trials and studies were advancing.
Years ago the russians trained dogs with bomb packs on there backs to go under oppositions tanks but the thing was the russian trained them with thier own tanks so when the dogs were sent out to battle they went under the russian tanks and blew them up. Just a bit of info