A 21-year-old Southern California man has been arrested on suspicion of animal cruelty after his pet Chihuahua tested positive for methamphetamine, police said Monday.

Isaiah Nathaniel Sais of Fontana brought his Chihuahua, named Jack Sparrow, to an emergency center in Upland on July 5, telling the veterinarians the dog had ingested the drug after finding it in his house.

On arrival, the dog was in danger of dying, suffering from convulsions, seizures and an irregular heartbeat, veterinarian Dr. Allison Pope said.