|There are raccoons and squirrels and skunks and rats,
Where do you live? If it is a wood rat (pack rat) you can NOT ignore it!!!
This is not a Norwegian rat, but a native rodent.
Wood rats will chew through just about anything. They make huge nests and have certain areas where they urinate and defecate (it can build-up to a huge amount). They like to chew insulation and electrical wiring.
Our neighbor down the road had a house fire because of a wood rat chewing on the eletrical wiring under the house.
If this IS what you've got, you need to act ASAP. Same goes for squirrels, raccoons and skunks.
If it is just a mouse, trap it. I am not a "let's-all-share-our-home-together" when it comes to rodents in our house. We live in the country and a mouse will find its way in. We help it find its way out. Via a snap trap. Works quite well............
|....becomes an infestation I can no longer ignore
By the time THIS happens, you will be looking at spending a LOT of money to deal with a problem you could have nipped in the bud earlier.
Good grief, it isn't a grizzly bear or rabid dog! It won't attack you. Deal with it and finish it!