He doesn't look like a purebred Lab, looks like he's got Chessie in him. I don't see Pit.

The Labs in the link Suki posted are very well bred show Labs who could easily do field work. Those dogs are not at all over done. Want to see over done Labs? Go here: http://www.wigwaglabradors.com/ These dogs do field work, but they are way, way too overdone and don't look like Labs anymore. I bet they tire easily in the field.