Man installs camera after dog stares at a spot on the wall for days

What does Crosby want to say?

What happened when George looked at the CCTV footage? Crosby didn’t stare at the wall all day at all. The footage clearly showed that he only sat there when George was around. When Crosby heard George approach, he quickly sprinted to the living room, where he took his now-familiar spot opposite the wall.

Why did he do this? It seemed as if Crosby was trying to make something clear to his owner. But what? The craziest part was that the dog was always very happy whenever George bothered to inspect the wall. The beast hadn’t been this merry since the death of its furry neighbors!

What was there to see on the wall?