@azygous has an article on introductions:
http://www.backyardchickens.com/a/introducing-a-single-hen-to-an-existing-flock
I'm very sorry to hear about your losses. Hopefully the Corid will help and they will recover soon. If you happen to lose another one in a short period of time, consider sending the body to your state lab for testing.
http://www.backyardchickens.com/a/introducing-a-single-hen-to-an-existing-flock
I'm very sorry to hear about your losses. Hopefully the Corid will help and they will recover soon. If you happen to lose another one in a short period of time, consider sending the body to your state lab for testing.