I actually worked in demining in South Sudan for a while, so just figured I could share a little bit of info:
As far as machines and how stuff is done now, check out minewolf. They're the de-facto producer of mine-clearing equipment. Basically, you have three sorts of methods for clearning an area. Machine, manual with detectors or dogs. As often as you can, you use a machine to do it quicly, and then use dogs/manual for verification. Dogs are not considering good enough for primary search, only verification.. and some organisations have trouble pulling that off even. Dogs are difficult, but a lot cheaper and faster than humans.
As far as using mice goes, they need to be very good. The UN does accredition for most humanitarion demining, so the mice will need to find all the mines in a training field before they're allowed to do real work. I really don't see that happening anytime soon.
As a low-cost solution for the army, or if you need something quick-n-dirty in a disaster zone I'm sure they have their uses though.. but with humanitarion demining, you kinda need to be able to tell people that they will not blow up if they start farming the land you just cleared.. which makes it a very slow process which takes a lot of effort, a whole different beast than military demining.
Also, on that note: fuck the US for dropping shitloads of cluster munitions on Laos, when you weren't even at war (Laos is the country next to Vietnam) and then having the fucking balls to not even attempt to help clean it up afterwards. FYI Canada and Europe are there now cleaning your mess.. some people consider less innocent children being blown up in pieces a good thing. Some people are, as a collective, not fucking assholes.
If you had any sort of decency you'd sign the Ottawa Treaty.