This now prevents the cats getting in. The entrance is 12 cm but tapers slightly because it’s a plant pot, I think some cats could probably still get in but the length of pipe means they are reluctant to as they would have to go all the way in and maybe not be able to get out. I would suggest pipe somewhere between 10 – 12 cm but no more or less than that.
Unfortunately this forum does not appear to support image uploads from your own computer, you need to have an account with an image sharing website like YouTube, Flickr etc. It’s really easy to set up an account then you can just select SHARE > right click in your post here > select PASTE and the link will appear to your photo or it will embed it also as in my post above. Or you can just copy/paste from the browser address bar. If you need any more help just ask
