But dogs are trained to sniff truffles and definitely stick to it for long, and the process (sniff around, signal to handler, get reward, repeat) seems the same.
Well, that's just what I read...
I'm no longer sure it is accurate. Looking at their website APOPO now actually use dogs as well. They say that rats and dogs are complementary, but they give an advantage of the dogs but not of the rats
Also, I ran across this article criticising the rats effectiveness: https://nolandmines.com/APOPO%20rats.html . I have no way to assess it's accuracy.