Bit fitting for an Icelandic horse - what bit size do I need?

Hi! 😊

Good that you vary between different options. The downside of the mullen is, exactly as you say, that horses tuck in behind it more easily. That comes down to the leverage effect and the extra pressure points. I think a halfway point between a snaffle and the mullen would be best, so that the difference in severity between the bits is not so drastic.

One example would be a Baucher bit. It moves more like a leverage bit, but horses rarely curl up behind it, because it is not a harsh option and it does not put pressure on the poll under normal rein contact. It tends to work well as a substitute for harsher bits.

When you say the sides of the bit are too close to the lips, do you mean the bit rings with the cheeks are getting too close? As for the length of the bit, the mouthpiece should not stick out more than half a centimetre at the very most on each side of the mouth, otherwise it is too big. Ideally the bit rings should rest against the horse without pinching the cheeks.

The best thing is to bring out a vet with specialist dental expertise, or a qualified bit fitter, who can help you work out which size is best. Getting the size right matters for avoiding injury, so it is worth bringing in someone who can help.

Good luck! 🥰