My girl Phoenix,was laying in her cage,then out of nowhere she started coughing or something,it sounded like a cat trying to cough up a hairball or something... She tensed her neck up,then after about 2 "coughs",she relaxed,I waited about 5-10 minutes,then checked her over. She looks fine,like it didn't happen.. She hasn't eaten yet,so I don't think it was regurgitation but Idk, Any ideas?