Thomas J. Williams of Monmouth Junction dragged the dog about a half-mile down Henderson Road before other motorists stopped him, South Brunswick police said.
The incident occurred at about 8:30 p.m. on Friday, April 7.
The dog sustained serious injuries to his legs and torso and was taken to NorthStar Veterinarian Hospital, police said. The dog is expected to recover from the injuries, police said.
A condition of Williams' release from Middlesex County Jail is he is not allowed to have any contact with any animals, according to the Middlesex County Prosecutor's Office.
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