Had my girls about a week and a half. Tough day today; lost one to dog. Went out to watch my survivors in coop to calm down, and am now worried about my Sussex pullet. She sounded strange/different from the beginning. As in different sounds than others, but now worse. I realize now that a chicken cold is not an option, so I'm a little worried about her and my others. Symptoms: sleepy eyes, coughing, sneezing, congested sounding, clear nasal discharge, snores with open mouth when sleeping (which is often). What should my first-course of action be? Isolation and vet?