Ah, but with the current setup, a head-bite can be followed up by anything stronger than Granger spit.
If a head-bite and a leg-bite didn't kill, but a head-bite and a chest did, then a lot of Human players would be happier.
45 base damage (default 48) sounds like a sweet spot.
Head-shot, unarmored 90 dmg
Leg-shot, armored, 7 dmg
Chest-shot, armored, 11 dmg