Surprise dog attack happens from 36:00-36:30, right after Tamura enters the village with the church. No barking occurs before the attack, making it difficult to anticipate.
the protag follows a couple of people in the village to a house and then looks inside the window at them, but the scene resolves too quickly to be stalking
there's an ant once, but the bad one is a swarm of flies that comes out of the crotch(?) of a guy leaning against a tree. it's the guy who keeps talking about Buddha and the plane that's coming for him