Can You Quickly Describe the Status of Dog Research?

In his study of dog play, I shadowed dogs with a video camera rolling and controlled my own delighted laughter at their fun. At this speed, I could see the mutual nods that proceeded to chase. And so deconstructed, the play could be reconstructed to see what behaviors match what postures. So can you quickly describe the status of dog research now versus 20 or 30 years ago? There were no research groups studying dogs. Now there are dozens of dedicated dog cognition labs all over the world.