You can also try a wooden snap box trap, which is better for outside. It is similar to a snap trap but has built up walls around it. These traps prevent other larger animals from getting killed by the trap. [3] X Research source

Check the traps frequently to keep them baited.

Rats are smart, so the longer the rats have to observe how the traps work, the harder it will be to kill them.

Try a box trap to avoid trapping larger pets, like cats or dogs. [6] X Research source Notify residents that you will be setting rat traps. Tell them where they will be located so that they can monitor their children and pets.

Look for rat nests and feces. Place traps near these areas because the rats will frequent them. If you want to set a trap in the ceiling, it’s okay to set them on top of panels. If there are no panels, you’ll have to go into the attic. [7] X Research source Listen for scurrying and scratching, then place the traps nearby. Most traps should be near a wall or the side of a large appliance. Rats do not often run in open spaces. [8] X Research source

If you leave dead rats in the traps for long, other rats will become cautious around the traps. [9] X Research source

Store the poison on a high shelf away from children and pets, and make sure it’s clearly labelled. If you use poison outside, it must be labeled for outdoor use. [11] X Research source

Some commercial poisons come already contained in bait boxes. If the one you choose doesn’t, you’ll need to buy the box separately. You can find these wherever pest control products are sold.

If you’re an apartment manager or maintenance person, notify the residents of your apartment complex where you’ve placed these poisons. Check with the manager before you put out poison if you’re a resident.

Rats will not eat spoiled bait, so make sure you keep it fresh. [14] X Research source

You can try other treatment methods between poisonings.

Don’t store food in the basement. This includes pet food. Encourage good pet food habits amongst your tenants. Food should not be left out. [17] X Research source

Check close to the ground for freshly dug holes. Rats sometimes dig near the foundation so that they can crawl through to the inside of the building.

You can use steel wool to fill in gaps around vents or pipes.

Ask tenants to regularly inspect their screens for holes and slits. Offer to replace screens at no cost to them.