Rodent Control for Mice and Norway Rats in Ohio Homes

Why do mice come into Ohio houses in the fall?

Cold. A Summit County Public Health fact sheet on the house mouse, revised in February 2024, says the arrival of cold weather each fall is said to push mice into buildings, where they look for shelter and food.

That is the fact sheet’s own wording: “is said to.” It describes the behavior and gives no count of how many mice or how many houses.

If the scratching in a wall or ceiling started as the nights turned cold, say so when you call. It is one more detail the operator can use.

How small a gap can a mouse or a Norway rat get through?

Small. A Summit County Public Health handout, revised in February 2024, gives two sizes:

• House mouse: an opening about 1/4 inch across.
• Norway rat: a hole about 1/2 inch across.

Those are the sizes to have in mind when you look at the outside of the house before you call.

Where do Norway rats live in an Ohio house?

Low down, as a rule. Summit County Public Health’s Norway rat fact sheet says the species has spread across the contiguous 48 states, and that it tends to live on the lower floors of a building with several stories.

Tell the operator which floor the signs are on.

Are there roof rats in Ohio?

Ohio is not in the range Summit County Public Health gives for them. Its roof rat fact sheet places the species along the lower East Coast, through the Gulf States and up into Arkansas, and along the Pacific Coast.

The same fact sheet says populations outside the normal range are reported now and then, and that such reports are rare. That is not a statement that no roof rat has ever been found in Ohio. It is the reason this page is about house mice and Norway rats.

Why do health agencies stress sealing gaps?

Because of what wild rodents can carry. The CDC says the most common hantavirus that causes hantavirus pulmonary syndrome in the United States is spread by the deer mouse. Its advice is direct: “Seal holes and gaps in your home or garage to keep rodents from entering these spaces.” It calls rodent control the primary strategy for preventing the disease and says wild rodents should be excluded from homes.

An operator inspects the house and explains the plan on the call. Questions worth asking:

• Which gaps were found, and how small the smallest was.
• What each gap will be closed with.
• How the rodents already inside are dealt with.
• Whether anyone comes back to check the work.

Cleaning up mouse and rat droppings is a separate piece of work with its own page.

Can mice or rats give you rabies?

It is rare. Hamilton County Public Health says small rodents such as rats and mice rarely get rabies.

If you are not sure, start by working out whether it is a rodent or larger animal.

What should I tell the operator about the mice or rats?

Ohio Attic Animal Removal is a referral service run by Local Core Group, with no field staff. A call to the number on this page is passed to an independent operator when one works at your address. Whether one does is settled on the call. The operator sets the price and answers for its own license and insurance.

Have these ready:

• Every room where you have found droppings, and the floor it is on.
• Where you hear scratching, and at what hours.
• When it started.
• Any gap you have already seen on the outside of the house.