i dont like the idea of mounts making noises other than footsteps, maybe the sound could be for when using fire breath or eating a bomb, but it is annoying when it makes those loud noises , like with the owl,

i cant even hear the background music through it in graal city >_< but i have a feeling removing the sound once its been sold isnt possible, unless you replaced the sound file with a silent/quieter sound file named the same as the original.