I have a 3 week old D'Uccle who keeps raising his head like he cant get air. He cheeps a little when I pick him up. But he does this continuously like he is having trouble breathing. He is having trouble walking now too like he has little energy. He stops for a couple of seconds and then does it again. Continuously now. I have separated him from the other chicks in his brooder and gave him antibiotic water and food, but he just sits there leaning on his side and raises his head and opens his mouth. He raises it up real high, almost all the way back when he does it. I haven't seen any poop yet, since I just put him in there about 2 hours ago. He started doing it a little a couple of days ago, now he does it constantly. What could it be? What can I do? Please help. THanks.