Montag walks home from work. He has enjoyed his day burning books. He gets a strange feeling that someone is following him (Bradbury 1-2).
A young girl named Clarisse approaches him and begins a conversation. She is strange and asks him many probing questions like Are you happy? (Bradbury ).
Montag enters his room. It feels cold and empty like a mausoleum. His foot hits an empty pill bottle. He sees his wife's body on the bed. (Bradbury ).
The firemen use the mechanical hound to kill small animals like cats and chickens. It is a violent and horrible game that shows the nature of the firefighters and disdain for the natural world (Bradbury 22).
Montag senses that the mechanical hound does not like him. It snaps at him various times. (Bradbury 24).
The mechanical hound is a metallic dog-like robot, used to hunt down and kill criminals. It uses their chemical compounds to find them. It is vicious and terrible.
Montag and the men leave the fire station to go to the house of a suspected book hoarder.