Was the other kid (Andrew) sick or not?
If Andrew was NOT sick, why hold a gun at Paul's head and leave in abrupt way?
Did Travis get sick and die?
What were all of Travis's nightmares about?
What / Who killed the dog?
Why was Andrew in Grandpa's room?
Well, according to the director the answer is: maybe. Which sums it up pretty well for me - this movie is a failure.
If Andrew was NOT sick, why hold a gun at Paul's head and leave in abrupt way?
They wanted to leave this house, whether Andrew was sick already or not. And Paul was insisting and terrifying them, so things escalated. Everyone was afraid or in panic, so people act irrational and emotional. The boy would probably not have wept so strongly, if it was nothing.
Did Travis get sick and die?
That's pretty obvious in my opinion, yes.
What were all of Travis's nightmares about?
In his dreams all things mixed up he experienced and that were important to him as a young man of 17. Sarah being a young attractive woman, the killing of his grandfather, the dog and more. He had nightmares and dreams don't make sense in a rational way. The problem is that important parts of the movie were dream sequences.
What / Who killed the dog?
We don't know. The director used the dog just as a prop to construct his story and explain the more and more irrational acts of Travis. It might have been attacked by a boar or shot by other people in the woods. I doubt the idea was some monster in the forest.
Why was Andrew in Grandpa's room?
Sleepwalking. Kids do it a lot. I dount the theory that Travis or Paul took him there to blame him. That was the weakest idea in the whole movie, a small kid opening the red fort knox door. And no one really questioned that in the movie. Not even Paranoia Paul.
I have a lot more questions, but actually don't think the movie is worth it. It's just too vague and tells a far too bland story in the end. People during the end times will kill each other over a pot of water. Well, who guessed? I don't think there is anything in this movie we can take away with us, neither thrill or supsense nor any deeper message or moral lesson. It was utterly boring over long periods and the climax imploded in itself.
Oh yeah, I forgot about that red door being opened. So it was implied that the kid opened the door? How stupid.
Yeah, throughout the whole thing I was waiting for some big reveal or twist, but just got more confusion and questions. Also boredom
Was the other kid (Andrew) sick or not? Yes, he was.
If Andrew was NOT sick, why hold a gun at Paul's head and leave in abrupt way? He was sick.
Did Travis get sick and die? Yes.
What were all of Travis's nightmares about? One of the first side effects of having the disease, it appears, is nightmares and/or sleepwalking. I feel he was probably infected before the 2nd family even arrived and just not showing outward signs yet. In my opinion, the family had no chance of survival from the very start. The Grandpa obviously got infected. Travis (and maybe even the dog) were likely infected at the time of the Grandpa's death. Travis, it seems, slept in the bed next to the Grandpa when he was alive, so Travis was likely easily infected. The mom and dad were certain to follow.
What / Who killed the dog? I feel the dog simply got sick drinking from the poisoned water supply (which I feel is what civilization was dealing with, a tainted/poisoned water supply). The dog may have gotten injured, either attempting to get back into the house, or by another animal.
Why was Andrew in Grandpa's room? Probably sleepwalking due to the early stages of being sick. The other symptoms (boils, black eyes, etc) arrive later.