Are you hearing noises in the attic? Does it sound too big and too loud to be a mouse? You could have a problem with squirrels.
In our area, it is very common to have problems with grey squirrels and flying squirrels. We also have red squirrels, but they are much less common. There are a few different ways to figure out which type of squirrel you are dealing with. What time do you hear activity? If it is late at night or early in the morning, you are probably dealing with flying squirrels, which are active at night and sleep during the day. Grey and red squirrels are the exact opposite.
The size of the opening going into the house can also clue you into what type of animal you are dealing with. Flying squirrels are very small and only need an opening about the size of a quarter to squeeze through. Grey and red squirrels need an opening about the size of a baseball, and something as large as a raccoon needs an opening about the size of a volley ball.
In some situations we will trap directly in the attic and in other situations we may choose to trap on the outside of the house near the entrance holes. Once all the animals have been removed, we can close up any openings to prevent it from happening again.