Hi. My DS is 13 weeks old and yesterday he did not eat all day. he is normally on a 2 hours -2.5 hours eating. during the night he had some nibble at the breast every 2-3 hours. this morning he had a green poo and a ruttling nose - stuffed? he sucks on a dummy though so do not undestandwhy he finds it hard to suck on a breast - it seems he wants to suck but cannot because of stuffed nose? how shall I feed him?