Happy Mouth 2 Ring Shaped Mullen Mouth Pessoa Gag La Carga Suspendida Banco de fotos e imgenes de stock iStock. The unique Apple scent encourages horses to accept the bit and the space age polymer provides for a gentler bit for a happier horse. Happy Mouth Bits offer no guarantees in the event of biting on the mouthpiece. Happy Mouth bits with bite marks are not covered under warranty. Due to the contagious nature of the equine disease EHV 1 and per biosecurity measure guidelines suggested by the American Association of Equine Practitioners, The Farm House will no longer accept returns on bits.