Both Normal And Mutated :)
No Animals, I HATE THEM!
Think about this for a second, Takes Earth for example. The Hive and the Fallen are there. They're out to kill you, a guardian, a living (or robotic) organism. Guardians have weapons to fight back, but a defenceless animal? What can they do? Animals would have been wiped out and made extinct years ago with the time of the collapse.