Here are a couple of resources on chicken diseases, and some on wormers and lice/mites, so you will have the info at hand should you ever need it again:
http://www.welphatchery.com/poultry_health.asp
http://edis.ifas.ufl.edu/ps044
http://ohioline.osu.edu/vme-fact/0018.html
And here is just one thread on the great difficulties associated with respiratory illness:
https://www.backyardchickens.com/forum/viewtopic.php?id=455704&p=4
I am sorry this is happening to you.
http://www.welphatchery.com/poultry_health.asp
http://edis.ifas.ufl.edu/ps044
http://ohioline.osu.edu/vme-fact/0018.html
And here is just one thread on the great difficulties associated with respiratory illness:
https://www.backyardchickens.com/forum/viewtopic.php?id=455704&p=4
I am sorry this is happening to you.