Originally Posted by wheelaway
Thank you for the education. I too have seen these cats and was happy to see someone was feeding but sad to know they'd likely be reproducing more homeless kitties. It's great that the colony is controlled. I wonder if a sign indicating it's a controlled feral cat colony would be helpful? I agree with the other post as well, the shelter could be being used for firewood/human shelter. I wonder if you could constrcut something out of styrofoam or other non useful materials?
Recycle Coroplast (aka corrugated plastic, aka campaign signs). We're a little past "Coroplast harvesting season", but it's getting pretty common. It's also pretty light, so it would have to be staked pretty securely.
I used Coroplast to create a tailbox for my recumbent:
I even wrote instructions: