We know fish have different sensory ability's, and I was wondering if they were able to detect metal as in a hook swivel split ring ect before they actually pick up the bait? Could there be some form of residual magnetic field or could there be some metallic taste emitting from said hook ect there that would warn them that all was not well. Has anyone tried fishing with a non metallic hook ie wood bone ect or just a bait tied on the end of your line? This query has come about from a discussion on the merits of various rigs hook patterns and also myself biting into a piece of KitKat with tin foil still on it! Any comments on this would be much appreciated.