https://www.bauhaus.ch/de/p/swissinno-supercat-wuehlmausfalle-20064536
I got something like this.
If you buy something like it, I recommend, you also buy their special tool to stamp out the hole it goes into.
It works great, I just ended up killing the wrong animal :(
edit:
It's also worth noting that some people say trapping will make them breed more. Can't really confirm, but sounds plausible...
Thank you!
I found it on e-bay:
https://www.ebay.com/itm/235534449712?chn=ps&mkevt=1&mkcid=28&com_cvv=8fb3d522dc163aeadb66e08cd7450cbbdddc64c6cf2e8891f6d48747c6d56d2c
I also found the tool on Amazon:
https://www.amazon.com/SWISSINNO-SuperCat-Tunnel-locating-Serrated-edge-Reusable/dp/B000PKII2M/ref=asc_df_B000PKII2M/?tag=hyprod-20&linkCode=df0&hvadid=693713553304&hvpos=&hvnetw=g&hvrand=3981796595421926247&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001656&hvtargid=pla-385656999258&mcid=2fa7c88c4908334b810456fc3651d2a4&gad_source=1&th=1
Thanks again for the info!
Yes, lower population = higher litter rates due to better food sources...