With pheasant, I cut out the spine, and when removing, everything except the lungs come out. I then run my finger under them, and they come out easily. Doves, though, I just take the breast. Unfortunately, I have not had occasion to hunt (or clean) other game birds, so I don't know how they compare to cleaning pheasant.
Have found after many-many birds—(pheasants)
That leaving that head on while skining
Cut both sides of the spine—
Grab head and pull
Then into bucket—
Just my opinion-and experience