The VERY best idea I found on the forum is fermenting feed. Nothing like it. I bought a big bottle of Corid and haven't cracked it open yet.
http://tikktok.wordpress.com/2014/04/13/fermented-feed-faq/
Very good point I usually tell new peeps it's a good idea to have a chicken first aid kit. Blue cote, an antibiotic, etc. So when their is a problem you have what you need. Pam