You have what Delawares are supposed to be. I had the Vempire Chicks, as I used to call them, two pullets and two cockerels I had to remove from the nursery coop after they injured 8 other chicks. They'd bite me, too, even at four weeks old, HARD. One cockerel was especially aggressive. I came to believe, after hearing some similar stories, that some hatchery had gotten ahold of an aggressive strain. I am getting some real heritage Delawares from a breeder I know (hi, Janet) next month and hope to finally have the REAL Delawares.