Being that I can't sleep.. found something of interest. My town has classified chickens as farm animals, well, legally they are not.
9 CFR 1.1 [Title 9 -- Animals and Animal Products; Chapter I -- Animal and Plant Health Inspection Service, Department of Agriculture], farm animal means any domestic species of cattle, sheep, swine, goats, llamas, or horses, which are normally and have historically, been kept and raised on farms in the U.S., and used or intended for use as food or fiber, or for improving animal nutrition, breeding, management, or production efficiency, or for improving the quality of food or fiber. This term also includes animals such as rabbits, mink, and chinchilla, when they are used solely for purposes of meat or fur, and animals such as horses and llamas when used solely as work and pack animals.
The complete listing is here:
http://www.access.gpo.gov/nara/cfr/waisidx_00/9cfrv1_00.html
Scroll down to section 145 to read about poultry.
Of course this could be another can of worms. Just food for thought.