The dogs death is implied and not mentioned. The only thing is the dog is temporarily injured after a creature attack but moves on quickly and is fine till it’s implied death. It dies at the side of its human being a good girl.
I would say no, but at a certain point a guy's girlfriend initiates sex with him and when he seems to not want to do it anymore, she seems angry because she thinks it's because he loves someone else. One could argue she can't take no as an answer, in the end they do stop having sex to argue about it
I don't think so, but they discuss about supernatural beings and often they say it feels impossible for them to be true, the characters wander if they are seeing things
The creatures are human like and eat humans, though they are treated more as "animals" than anything else. They appear slightly human though and shows to be quite clever