You can get a multitude of toxic effects to you and the environment at the higher levels of concentration. You are wasting the chemical and money. And you can easily damage ornamental plants. You can make the area sprayed so repellent to the insects that they go somewhere else, such as into buildings. And you can kill a whole range of non target species.
Birds are many times more sensitive to chemicals than mammals.
This mold kills many birds. It is much easier and cheaper to keep rodents out of buildings and to deny them the food shelter and water they need to survive. If you must use baits, don't use the anticoagulants. They take from four to fourteen days to kill and will poison other animals if they eat the rodents. Now you know why some rodents are resistant to poisoning, they are getting the antidote from the dog food you store in the garage and put out on the patio.