It seems like you are referring to the novel "Fahrenheit 451" by Ray Bradbury. In the book, the Mechanical Hound is a robotic creature used by the fire department to hunt down individuals who possess books, which are illegal in that society. The hound serves as a symbol of the oppressive government's control over knowledge and ideas.
It is a mechanical dog type thing that can hunt down anybody that has books.
the Hound injects its victims with fatal amounts of morphine
In Fahrenheit 451, the mechanical hound is ultimately destroyed by Montag, who uses a flamethrower to disable and destroy the robot.
In "Fahrenheit 451," the fireman named Montag turns the flamethrower on the mechanical hound, destroying it in self-defense as it is programmed to attack him.
The mechanical hound in Ray Bradbury's "Fahrenheit 451" has eight legs.
The hound doesn't like Montag and this is because the hound is programmed to be able to sniff out chemical compistions of books
The mechanical hound in Fahrenheit 451 could remember the scent of ten thousand different individuals.
The Hound growls at Montag in "Fahrenheit 451" on page 28 of the 60th Anniversary Edition.
Because the hound is watching over him!
Montag mistakes a deer for the Hound in Ray Bradbury's "Fahrenheit 451." The deer startles Montag with its sudden appearance, causing him to compare its eyes and movement to those of the mechanical Hound.
In "Fahrenheit 451" by Ray Bradbury, the Hound is a mechanical creature programmed to attack and kill. It doesn't have legs in the traditional sense as it moves around on robotic machinery.
Montag believes that the Hound, a robotic creature in Fahrenheit 451, has been programmed and tampered with to ensure it identifies Montag as a threat and hunts him down. He is suspicious that the Hound has been manipulated to target him specifically.
In "Fahrenheit 451" by Ray Bradbury, the white animal is actually a mechanical hound. This hound is used by the fire department to track down those who are in possession of books and hunt them down. Its purpose is to eliminate any threat to the society's strict anti-book laws.