oracle said:

hi just a quick one has you paid any thought yo pitching down the boga beasts sounds during the seens of obi-wan riding or summoning it. I just thought a really large beast should have a more menacing sound

Well it seems to me like the Boga is quite similar to a lizard with feathers, like half between a dinosaur and a bird. Maybe replace bird sounds with raptor sounds from Jarassic Films?

Maybe a little something of either one of these sounds

http://www.youtube.com/watch?v=ZwxQQJz_-Ko