Ok I was given a spoon bit that has what is called sweet iron. It looks like Number 15 in this page
http://www.capriolas.com/cgi-bin/shop.cgi?page=mouthpieces.html&cart_id=2321765_14213
At the bottom of the page it says they rust, I was told it won't harm the horse, but mine looks rusty. I tried to switch to another bit similar style to it but it's not "sweet Iron", when i use the new bit my horse gets upset(pins ears back and tries to buck) But as soon as I give his old sweet iron bit he does fine. I don't know what to do, should I keep him with the rusty sweet iron but, to me the rust would harm him? Please Help!!
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