if that was a boar hog he might come back with time maybe not to the same bed but close by the reason he laid down there is because he felt it was a safe place and thats what a hog always needs if it wants to get some rest but im not for sure that boars make nest it could have been a piggy momma thats most of the cases i find were i hunt but that nest spot will get u a hog if u wait it out long enough it just might not be the same one