Was thinking of putting cat flap in glass doors but idea abandoned due to extortionate quote.
So, we are going to put a cat flap in a wall that leads to an alleyway. There seem to be so many different types of cat flap - infra red, magnet, microchip, etc. Which one should I get and why?
Also, our wall is about 30cm thick. Can we just add extension tunnel to extension tunnel (IFSWIM) or do we have to get just one very long one?