Maze: Picked up Penumbra thanks to your post. Damn DOG is a pain. Finally beat it to death with the hammer from on top of a crate. Next level ran into three and got them with the pick. Not your typical FPS type game, I like it! I found that there is no easy way to take the dogs out when you are on the ground as they run around you, just like real dogs, then you're dead in three bites. When I tried the crate tactic the first time I accidently hit the crate twice instead of the jumping dog and smashed the crate allowing the dog to get me. Very creepy game atmosphere, it makes you weak and scared :-)
Thanks!