This has probably been posted before but I found it really useful! I'm just getting ready to cut back my huge area of mint and yarrow and now I'm going to dry it out and use it periodically in my chicken run. Previously I just composted it but I think it will be more useful in the chicken run after I read this report. I'll put some of the fresh cuttings in there regularly until frost and save my dried stock for winter. I'm going to try a few other things in this report too. Hope others find it helpful.
http://www.ca.uky.edu/smallflocks/Factsheets/Natural_remedies.pdf
http://www.ca.uky.edu/smallflocks/Factsheets/Natural_remedies.pdf