Penumbra Requiem : What to expect?

[Petike]

And im not sure the dogs are under the tuurnagit influence, rnt they guard dogs that have gone wild? And the worm and the spiders are just affected by the tuurngait presence?
I dunno, maybe im wrong.

My theory is, that the doggies are partly wild and partly used by the Tuurngait hivemind as sentinels of some sort... They are less intelligent than the infected humans, but still smart enough to protect the whole base (including the mines) from any potential trespassers, that could discover the whole alien mystery... As for the spiders and worms - they either became infected too, or were affected by an uknown energy source, brought to Earth by the Tuurngait. Either way, a side effect apparently occured, that gave them the ability to grow much larger than they naturally would. Because they are predatory creatures relying only on simple instincts and skills, and have no real intelligence, the Tuurngait would barely have any practical use for them - at least not a deliberate one...