I went to the vet today. He said that i should stop the antibiotics for two days, and then if i see symptoms of swollen head syndrome, then i should start killing my chickens. There is a big chance to lose them all.... What on Earth went wrong? I had them clean, feed them, and give clean fresh water every day. If the worst case scenario become reality, then i will stay with only one baby chick that i had isolated due to tape worm infection.