Great comic! Actually, by Khan swallowing him this becomes an excellent object lesson to show Mushu that he is definitely not a cow as he can explain that being a horse, there will be only one stomach he is going to be "processed" through, just as which he is now experiencing. However, if he were a "cow", he would be going through FOUR stomachs instead. And also, unfortunately for him, horses are only rarely, and with great difficultly able to regurgitate their stomach contents so it looks like this might have to be a "one way" trip for him, though with luck, and a little "dragon magic" he will hopefully emerge in the same condition as he went in!