Blue Alloy Bits
 

My horse rarely has a wet mouth when ridden. I?ve recently changed her bit to a Mullen mouth and she?s now salivating a lot everytime ridden. It?s a blue alloy bit, but I?m not sure if the extra salivation is due to this or due to the Mullen mouth (always previously ridden in jointed bits).Having used it a few times, there have been a couple of occasions where there?s been reddish/ brownish colouring in the foam around her mouth - to the point where it looks like blood. I?ve checked (and my trainer has checked) her mouth and there is no sign of any cuts or rubs. I?m therefore wandering if it?s the oxidisation of the blue alloy? I know they do change colour and that?s what?s supposed to give them a warm sweet taste, but is it normal for this to cause the mouth foam to go reddish/ brown?

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