Shires EquiKind Mullen Mouth Full Cheek Snaffle. The Shires EquiKind Mullen Mouth Full Cheek Snaffle offers a mullen mouthpiece that applies pressure to the bars of the mouth and is ideal for young horses. The Full Cheeks prevent the bit from being pulled though the horse\\\'s mouth and also aids with steering. EquiKind Bits are similar to rubber but are lighter and more flexible, offer an apple flavour for palatability and are ideal for young or sensitive horses as they are kind on the mouth.