hi. I have one chicken. She is six years old now. In the six years, this is the second time she is sick. The first time her nose were bleeding and we took her to the vet. I think it were resperatory problems. Tonight is the second time. something is wrong. the is breathing heavy and make wheezing sound. open mouth. funny thing is, none of that during the day. only started now. think it is resparatory problems again. How dangersous is this. ? and do i need to take her to the vet? or can i just treat her with baitral and put apple side vinegar in her water?