Try this link
http://agriculture.nh.gov
This site has a wealth of information on New Hampshire Agriculture. It has events calendar, locations of nurserys and greenhouses, farms, stables etc. When you get to the site, click Publications, it will be in PDF format, scroll down and click NH livestock directory, then scroll to Poultry. Poultry is located well below the cows, deer, Horses, LLamas and goats but it's there and lists farms where you can buy laying hens etc.