Oh that is sad! Did it look like pasty butt or maybe some type of abscess, or was it dried blood on the vent? I am just curious. There are so many things that can go wrong when you buy new chicks, pullets, cockerels, hens or roos. Sorry you lost your three newbies.Chickens butt was all black...So sad came home and was dieing...nether me or hubby could cull it...