There is no such thing as "cheyennes". The name "Cheyenne" is used both singular and plural, i.e. one Cheyenne, 2 Cheyenne, etc. In another program it uses "Cheyennes" as the title, which is also incorrect.
Matt is the enforcer of the law in Dodge City, yet he ignores Doc's stealing crackers from Ross's store, nibbling on them, and blithely tossing onto the floor an unfinished one. Doc is guilty of theft and littering, and Matt of dereliction of duty.