What a fantastic cat run!
I have two young cats, they don't go out much at the moment, mainly because we work a lot and I get sick of having the door wide open in the winter! They go out quite a lot in summer.
It drives me up the wall when people leave my door wide open because it means we have to go find them or wait until they come home, it can be annoying if we are supposed to be going out.
I guess the only way is to keep doors locked, so no one can just walk in. We've found that they're not actually that bothered about going outside, they are best friends and seem to prefer playing inside together. They have lots of toys and their own bedroom, so I think they feel like they have enough space. We also spend ALOT of time with them, any cat would have a cuddle over a cold day outside!
