We suggest that you refer to our helpful and informative Rat Treatment & Control Guide for all of the recommended steps on getting rid of rats inside of your home, and for links to related products.  Keep in mind that sanitation and exclusion are keys to Rat Prevention, which means cleaning inside of your home thoroughly, removing any food sources that draw them in, and locating their entry point and sealing it off to prevent them from entering in the future. We typically recommend baiting outside the home in tamper resistant bait stations and indoors, using glueboards or snaptraps. For severe rodent populations, Fastrac Blox would be suggested for a knockdown/cleanout treatment. This rodent bait is a single feed bait with a kill time of 1-3 days.  Please remember, heavy rodent populations can not be eliminated overnight and result times can vary on full elimination.