It's hard to say. A dog appears with a boy inside a building and it's no longer seen. Then, later on we see the boy running away with his grandma, but the dog is not with them. So, it's impossible to say what happened to the dog. Maybe they left the dog behind because there was no space in the car.
No but there are 2 bodies hanging in the trees upside down as a deterrent- this occurs right after the main character and woman are trying to start the car for the second time.
Bruises on elbows from needle marks. Mention of needles being used to inject subjects. Later in the film there is mention of using a needle to inject medicine.
Guns pointed at each other when inside the house. Cabinet full of shotguns and rifles in the house. A lot of gun use and shots throughout the film. Someone is shot multiple times at the end of the film.
Not a mental institution but a backyard surgery vibe in the basement with patients strapped down. There is also a makeshift hospital ward in a barn-like structure.
Plaid-wearing man tries to grab the mute lady, she fights back, he grabs her near the head/neck and forcibly kisses her. Interrupted by other woman with gun to his head.