Here is Why you Need to Trap and Not Poison
Mice like to take food and eat it in the security of their nests and beds. They are not afraid of bringing a big piece of poison to their nests, and if their nest is in your walls, they will eat it there.
What this means is your mouse will eat your poison, and then die in your rafters or walls. The smell can be terrible! And, if you have a large mouse population, you will need to remove walls, to get the dead animals out of your home’s interior.
Mice who die in walls due to poison or toxins, will also attract flies and other scavengers. The smell will bring in one fly, and they will find your dead rodent. With this, you will be overwhelmed with black flies until the dead creature is removed from your walls.
Some rodent experts use poisons in commercial applications, but never in a day care setting, or a child’s school. The reason is the poison can be moved easily by the mouse population, and if you have a risk that little kids, who will place anything in their mouths, may eat that mouse poison.
Mice like to eat. We all have this idea from the Mouse and Cat cartoons that are all in love with. They often are very happy to take food, and store it. They will fill your walls with poison if you let them!