Poisons are Cruel: Bats are not bugs, and you should not poison them because they do not die immediately and will undergo a lot of pain. Even if you are not there to see them, you are being cruel to the bats. It would help if you did not subject any animal to pain and discomfort because they have animal rights protection laws. Moreover, bats generally do more good than harm, and so you should evict them if you can no longer tolerate them in your building.

Finding the Dead Bats: Let us assume for a minute that it is safe to poison bats, after killing them, you would end up with another problem; how to find the dead bats and dispose of them. Bats can crawl into your walls or attic and die there after you poison them. You have to hunt and search for the dead bats or endure their stench as the bodies decompose.

You might not kill all the bats, and you will not be able to enter into the attic or basement if other bats are present and so you will still have the bat infestation problem, and you will have to endure the stench of the dead bats.