A rat scraped at the cement with its very efficient teeth. If its teeth brake, they grow back with in a week. This picture is a sewer junction under the ground.
The rat has made its way out of the AJ junction and then under house and into cavity and then travels up to attic or in some cases can travel under kitchen and living room floor where there are more voids. They then sometimes eat into water pipes causing leaks and other havoc.
Contact RAT TRAP for Rat Pest Control Dublin.