When it comes to getting rid of rats, of big Norway rats or of attic rats, you have not very much options to select from. Using rat extermination techniques you read about on the net is one possibility, but you are going to be required to invest time, money (for tools and poison, traps, etc); than we have the variation of trying to figure out to make a cat catch those big rodents that are messing around; in case something like this fails you have no more options left than to call professionals from wildlife mangement and pest control companies that are going to have some fun finding the main cause of the infestation and will definitely give you a hand of support when it is necessary, in exchange for certain goodies that you migh offer them!