Here in Holland we have the same problems with 4 legs rats. Just ordered this 'Automatic Humane Non-poisonous Rat And Mouse Trap Kit' powered by a CO2 cilinder. I hope this will do the job: https://www.aliexpress.com/item/1005005061564322.html?spm=a2g0o.order_detail.order_detail_item.3.6e8ff19cmPZYb