I have an almost 10 month old hen. She started breathing heavy with her mouth open yesterday morning. She won’t cluck and she stays away from the rest of the flock. She sounds like she’s wheezing as well. She doesn’t have a runny nose, she’s not sneezing or coughing and she doesn’t have goopy eyes. She isn’t shaking her head around either. She wouldn’t roost last night and I brought her in this morning. I fed her scrambled eggs and she ate them no problem. I’ve been giving her water with electrolytes in a syringe. Her poop is quite dark/green. The rest of the hens are fine. Will she get better on her own?