A suspect bit the ear of a 4-year-old police dog and injured the animal's neck during a chase and arrest, police said today. The dog, Rex, was on patrol with Constable Philip Rajah in the Natal provincial capital during the weekend when they came across two ``suspicious individuals,'' police said. While Rajah searched one man, Rex chased the other _ and got the worst of it when his quarry turned on the animal and bit him. Rajah had to yank the man off the dog, police said. They said the dog was being treated for a serious neck injury at a veterinary clinic. The man who bit the dog may face a charge of malicious injury to state property.