There are a few ways to get rid of a small animal in your attic. You can try using a humane trap to catch the animal and then release it somewhere else, or you can call an exterminator to come and remove the animal for you. another option is to seal up any openings that the animal may be using to get into the attic, which will force it to leave.

You could try setting a humane trap. Once the animal is caught, you can take it to a local wildlife rehabilitation center. If that's not an option, you could try poison or using a firearm to kill the animal. Please be aware that there are laws governing how you can and cannot kill an animal, so please consult your state's hunting regulations before taking any action.