My year old SLW hen is making a honking sound once in a while and is sneezing. She isn't lethargic and she is eating, but the sneezing is worrisome. We have had a big temperature change in the weather.-could she have a cold or sinusitis? None of the chickens are doing this. I quarantined her this morning. She does not like being seperated but I didn't want to take chances. What diseases or conditions could cause this? I am very biosecurity oriented. They are allowed to free range for 30 minutes or so a day, but that would be their only opportunity to catch anything. All the others are fine. Should I be concerned? Her poop is fine and so are her eyes. Just sneezing and honking/bad crowing. What should be my next step. All are starting to molt. All are eating layer pellets with scratch and fresh greens from the garden. All are pets. I want to be proactive--so, should I just watch, should I treat with antibiotic (and what one) or am I being a worry-wart.