I've posted separately about this Welsummer's leg issues (https://www.backyardchickens.com/forum/viewtopic.php?id=351237), but I'm worried about dealing with the respiratory issue as soon as possible. Can anyone help? She coughs and has a wheezy/rattling/crackly sound. She does not act "sickly" at all other than these issues. I assume that I should give an antibiotic, but I need help with which one and what dosage would be appropriate. Is there any chance that the leg and cough are related?? Thank you very much!!