Ed
We used to deal with rats with a similar trap that work quite well. Oil drum with the top cut off. Lay wooden path so that the rats could get up to the top lip of the drum. Place food material (animal fat worked quite well) in the drum itself and on the lip. The rats would climb up, jump in to eat the food, but not be able to get out.
Brewer
Sealing is required to keep the mice out every year. Try to caulk around the pipes, etc. Traps with cheese always worked for us.
We used to deal with rats with a similar trap that work quite well. Oil drum with the top cut off. Lay wooden path so that the rats could get up to the top lip of the drum. Place food material (animal fat worked quite well) in the drum itself and on the lip. The rats would climb up, jump in to eat the food, but not be able to get out.
Brewer
Sealing is required to keep the mice out every year. Try to caulk around the pipes, etc. Traps with cheese always worked for us.