How Can I Tell What Animal Is In My Wall. It is possible you will be able to identify this by peering down into the wall where it meets the attic. Check on almost any surface not covered by insulation, and there should be a layer of dust with animal tracks.
A dog trained to hunt can help you locate where the animal met its demise. In many cases, you have to dig up insulation in the attic or cut a hole in the wall. You can also look at the animal tracks left in the dust in the attic.
I have found that experience helps a great deal.
In order to find the exact spot where i need to cut a hole in the wall, i have to sniff and sniff. Size of the little guy. This is a good indication you have a cadaver lodged in your walls. In short, you have to search and search, and sniff and sniff.