SERGEANT BLUFF — Officials of a city in western Iowa are considering changing an ordinance on vicious animals to allow pit bulls within city limits. The Sergeant Bluff’s city code currently prohibits residents from housing pit bulls in the city. The breed is banned in many cities because it’s believed to be predisposed to vicious behavior. The decision to reconsider the ordinance came when resident Sam Vice requested a hearing after police became aware of his American Staffordshire Terrier.