Thank you meg for your reply.
the thing is he doesn't eat when he is awake, and I know he is hungry because he hasn't eat for 5 hours and begain to eat his clothes. but he start to arc and cry when I put a bottle neat his mouth.
the only way to make him eat is to wlk him un and dow stairs and get him asleep (if he is too deep sleep he doesn't eat either)
does any one know why this suddenly happen? and what is wrong?