How to tell if you have rodents in your walls of your house?

I've been hearing sounds in the walls of my house. Sounds like scratching and squeaking.How to tell if you have rodents in your walls of your house?
Do you have a very old house??? Is there a crawlspace underneath? Have you seen mice running around constanly in your house? If you answer yes to all three chances are you are having a mice party in your walls......mice will climb in walls to find insulation and warmth and to make a nest......if you have never seen a mouse running around your house before it is unlikely they are in your walls....call an exterminator or place a bunch of mice traps around until you stop catching the mice.....put cheese or peanut butter in your traps.....mice cannnot resist that......How to tell if you have rodents in your walls of your house?
You probably have some kind of rodent. We can tell if there is mouse around because our mini doxie goes nuts and whines to tell us where they are. We live in the country, so mice happen.
then you might have them if they are agitated by noise than ya it is a mouse