Hi I am Chinmay (call me RC)
I have a evidence that disproves the existence of fire dog. It is that in Hunter Quarry, just like the normal plane crashes, many times planes crash there and cause fire and the burning wreck moves away....this burning wreck of the plane could be thought as a fire dog by some player...
NOTE : because i wasnt havin' any camera, i couldn't take the shot of the burning wreck... :P sorry