Bird feeders, or outside catfood, dogfood,deer corn ect will attract them. We live in the country if you feed outside you will probably get rats. If you poison the rats then your dog or cat might eat them ,if you have pets. Too bad you cant import black snakes somehow,they feed on rats and small rodents.We have had goats ,chickens,outside hunting dogs,the food creates problems.Maybee a pest control company with bait stations,but then watch your pets. If you find a solution let us know.