I have a five week old Isa brown chick with some strange symptoms that I can't seem to match with anything I'm finding via Google. The best I can describe is it's as if she has a balloon inflated in her chest, though I don't know if it's air or fluid, my best guess would be that it is just air though. She has been like this for, maybe, two weeks and is getting steadily worse. At first I thought it was just her puffing out her breast feathers, and even though the feathers stay constantly puffed out, there's obviously a size difference in her chest cavitity and that of the others. The breast is probably two or three times the size of the other chick's, but it isn't flesh.
She otherwise appears to be fine, she's alert and talkative, she eats and drinks and her droppings look normal. She doesn't appear to be in pain, but she does sleep a lot. I think the size of her chest makes it difficult for her to walk because she's pretty top heavy, but she can waddle, and roost.
None of the other chicks are exhibiting similar symptoms and are all very well, though I have her isolated. All chicks have been on a medicated feed from a local supplier, and the hatchery I bought them from (Townline) vaccinated them for Mareks. I clean the bedding, which is pine shavings, weekly.
I haven't done anything else for her right now, no idea what to do. I called the vet but they don't work with chickens. :( Any ideas?
(Edit: I'm not sure it's an impacted or sour crop because she is eating and passing normally and is not emaciated.)
Edited by smaug - 4/19/11 at 8:35am