After I send you the picture of our cats in our house in Belgium catladder.blogspot.com/search/label/Tournai, we moved to Malaysia where we are building a house.
We had the contractor (Mr. Yeoh) make holes in the walls so our cats can go around inside the house without having to have all the doors open.
After the initial puzzlement of why making holes in perfectly good walls, they caught on to the idea and build this wonderful entrance for our 4 boys.
The house should be ready in a couple of weeks. Once the cats are used to their new habitat I will try to remember to send some more pictures.