I have to agree Michelle, if one of my cats had had that adverse a reaction to showing i would not have repeated the experience.
The coat problem is clearly not dietary, so I guess, it might be useful to go back to the breeder and find out it there were similar probs with littermates or relatives.
As for the other behaviours, will have to think about it and give a fuller response once home. But orientials, like siamese, are cats with attitude so it will require some fairly consistent and appropriate response. Will get back to you once i have thought some more.