Turns away
The Messengers I think.
The Ghost has to leave Hamlet because morning is about to come. In Shakespearean times, it is believed that dead spirits cannot dwell during the daytime which is why they come during the evening. Since the cock crows, that means the sun is about to rise and The Ghost must leave.
The rooster crows.
Yes. "It faded on the crowing of the cock."
Yes, crows have been observed to detect and react to the scent of death, which helps them locate potential sources of food.
Cats have high senses, yes they do detect ghost.
The Huckleberry Hound Show - 1958 Two Corny Crows The Ghost with the Most Baffled Bear 1-9 was released on: USA: 27 November 1958
Act crazy
Dogs usually bark at the entity{ghost}
"Gentlemen, rise. His highness is not well."
Not a dang thing. The ghost only talks to Hamlet; he will not talk to Horatio.
He's scared at frst and doesn't belive that Marley's ghost is real. But then he starts to believe by some of the things that Marley says and does.