I am inheriting 2 quite elderly cats one of which is very poorly [I don't even want to think about what time he has left :( ]. I live on quite a main road and to be honest it is far from ideal for cats ( I had to deal with one neighbour's cat fatality on the road). A friend has suggested getting a cat run. I don't even know where to start. Does anyone have one the can recommend? What size should I look for? What are the things to look out for? How do you get the cat from the house into the run? I just want to do what is best for the cats.