Unfortunately, one does not catch rats order

The principle is smart, at least from the theory.
I had to pursue happiness, like a rat fell into the trap, the ramp closed and the way barred. Unlike in the video where several rats quite comfortably in the case went so after the ramp even volunteered the second barrier (door) aufdrückten and then caught 'right' to be thought "my" rat not mind, because she pressed continuously while against the barred ramp that these finally relented and allowed the rat free. Very interesting animals, these rats!
The problem was that the 2nd barrier (metal lid) the ramp is not held enough (is only a thin Blechlein incorporated as a barrier), because the rat, than turned with her tail, the steel door "accidentally" pushed open and this ramp therefore released again.
None of the rats (2, I could distinguish, it was probably more) has ever approached more the cage:
Experience makes you smart.
So what have I done?
Stored 1. No fruit and vegetable leftovers more near their dwelling
2. The neighbor's cat is no longer sold only because she had gekaxxt on our races.
3. a lot "TamTam" to the dwelling (soundscape)
4. The removed cover dwelling (vines), so that a clear view was to the dwelling.
5. The holes closed with heavy stones
Since then, peace. Actually, I find the animals comical, really nice, but who knows how big the family is, or is already, and if they undermine the house.
Long story short: I think these live traps indeed for an ethically high Settled idea, but it is only a theory, because rats are very intelligent, unlike the rats in the promotional video for this trap after another scurry a beeline into the trap ,
The idea I give because of ethics 5 stars, but since it is only theory and can not fold a reliably.