I have a pullet that has had a rough couple of weeks. First she got a beak injury and lost the front tip of her upper beak. Shortly after that she started wheezing and seeming like she has lost her voice. When I picked her upside down to make sure she didn't have something stuck in her throat I noticed that she had yellow liquid oozing from her vent. I put her on some tetracycline, not sure what to think. I have isolated her from the flock.