Update they got under the sofa. But NOW! It really is!!! Impregnable!!!!!!
@Sissas Never underestimate kittens! They want under that sofa? They go under the sofa, and if they have to make use of quantum tunneling :)
@draco it is nuts how creative they get! I am not even trying to block the entrances, I am just throwing junk under the sofa so that there is no space there at all. And yet I am sure tomorrow morning they will somehow have found themsleves there!
Yeaaah this morning they were hiding inside a cabinet. They found a way in through the back.
You know what this means though, right?
Under the sofa IS impregnable!!!