There are three basic types of documents: synoptic reviews of chicken communities and their ordinances, persuasive case statements, and strategic advice.
The most current and most authoritative is Jaime Bovier's Illegal Fowl: A Survey of Municipal Laws Relating to Backyard Poultry and a Model Ordinance for Regulating City Chickens, which appeared was published by Environmental Law Institute®, Washington, DC.
This is a fantastic document that should be given to all government staff charged with developing chicken keeping ordinances. Overall, it is a well-researched and well-documented analysis. It contains a model law and it is generally very reasonable.
Here are the places where we might disagree with the model:
(a) a. Number Model calls for no more than six hens. CLUCK argued for six unsuccessfully with the City. Six is a good number for a truly urban, small-lot situation, but at some point (half acre?, one acre?) it would make sense to allow a few more birds.
(a) c. Enclosure Models calls for 2 square feet per bird and they can't be allowed to run free in the yard unless supervised by an adult. CLUCK supported 4 square feet per bird in the City of Sarasota and believes chickens should be allowed out in the yard it is if equipped with a fence sufficient to contain the birds. As far as supervision goes, if birds are out in a yard that is fenced, but lacks a top fence, we agree that some responsible party should be within earshot. But a responsible child can handle this task.
The model ordinance is very short and straightforward, but appears to make chicken tractors illegal. It also has a permitting requirement, which seems to be an older approach for people who want just a few hens.
If you are aware of other documents that should be included, please let us know.