Predator proof locks?

[Frau anita]

We use those locks on the interior doors of our house. Excellent security, but would be a PITA for me to use on the coop because I’m starting to have an issue with hand strength, so if they were wet, I’d probably not be able to grip them hard enough to get them open. Nice to have inside tho!

I have arthritis in both hands and that is why we put on those locks. A little wd 40 helped them move easier even in the freezing weather.

 

[Ted Brown]

A bit of caution. Carabiners come in different styles - the one you show and others that have a means to "lock". The ones I use have a threaded "barrel" that turns up to enclose the lever bar.

Racoons can operate the style you have used. Pesky but clever rascals with paws that can mimic our finger movement.