I agree with Reginang. Sometimes my boy doesn't like to drink milk, then we would spoon feed him. He will back to normal and use his bottle after a couple days or a week.
I am feeding my boy with Meiji and he is OK with it. People said that the taste of Meiji is very close to breastmilk. You could buy a small pack of cube size Meiji (about $50) and let Dor Dor to try. If he doesn't like it, you will not waste the whole can of milk powder ma.