I have been raising chickens for almost 3 months now. I keep them in ventelated rooms in an old building on the farm- a home made broiler if you like. Well they stay in the one room up until two weeks, then I move them to another room where they stay for another two weeks and then I move them to the last room where they stay up until they are ready. Two days ago my husband and I moved the 4 week old chicks into their new room. Strange thing happend today when I went in to clean, two of my chickens was shaking. I have never seen this before. My husband is scared that it might be newcastle but my chicks have been vaccinated and I am very disciplined on my hygeine. On the internet they say that the chickens head is suposed to shake when its newcastle. . .very confused. Can someone shed some light?