I have a RIR that sometimes sounds like she has phlem in her throat when she breaths and she also makes that gaping action occasionally. I don't see anything in her throat. Is it CRD? How do I know for sure? I've read about CRD, but it seems to have other symptoms like bubbles in eyes, runny nose, sneezing and she has none of those. Should I still treat her with Terramycin?