Hello everyone. This is my very first post because I bought my very first chicks 2 days ago. I have noticed some very obviously different behavior from one of the chicks. 1) What type of bird: It is a week old female Black Australorp. She does seem to be a little bit thinner than the rest of the chicks. 2) The Behavior: She has more heavy and open mouthed breathing. She lays down whenever she can and usually leans to one side or the other. When she seems ready to sleep, she lays almost all the way on her side, puts extends her neck and extends her legs, and sometimes lifts the wing. I have attached an image. It may be hard to see but she has her wing in the air as well. 3) How long has the bird been exhibiting symptoms? Since we got her 2 days ago. 4) Are other birds exhibiting the same symptoms? No 5) Is there any bleeding, injury, broken bones or other sign of trauma. No, she seems to get around just fine - no limping, falling over or anything like that. She just lays down much more frequently than the rest instead of standing. 6) What happened, if anything that you know of, that may have caused the situation. No 7) What has the bird been eating and drinking, if at all. She eats and drinks the starter chick feed, chick grit and water normally just like all the others. The only difference is she lays down a lot while she is eating. She doesn't take as much of an interest as the others do when we feed them mealworms. She will run around a little bit but does not want to eat the mealworms. 8) How does the poop look? Normal? Bloody? Runny? etc. I think it is normal. No blood. 9) What has been the treatment you have administered so far? I have added some ACV and a probiotic-vitamin-electrolyte blend to their water. No treatment so far. 10) Describe the housing/bedding in use. I use fine pine shavings. Does anyone have any ideas as to what might be happening? Thank you for any help.