I thought, at the spell level he was casting at, the required ritual was merely a gesture and/or a word.
Hawk doesn’t have any spell at less than a 15, and:
Skill 15-19 - Ritual: You must speak a word or two or make a small gesture (a couple of fingers are enough), but not necessarily both. You are allowed to move one yard per second while making the Concentrate maneuver. Time: as listed. Cost: Reduced by 1.
No, no he can’t.
Neutralize Poison:
Time to cast: 30 seconds (beware fast-acting poisons!). ONE TRY.
Hawk can attempt to heal the damage as fast as it occurs, but it looks like he’s stuck with the poison.