- Mr Owen L
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- Exalted Heroic Member
Posted by: DecepticonCobra
Flood require enough biomass and calcium to build off of. Jackals don't have much calcium as they are an avian species and Grunts don't seem to have much biomass. That's my idea though.
I've read that somewhere as well it is to do with levels of calcium and as grunts are small lack sufficent levels. Also Bungie didn't/couldn't make the models for the game.