Well it looks like someone is thinking on the same lines as I am. John Goodwin in his articles belives that is how the Avain virius will find its way into the United States and I would not be surprized it is how it is getting into other countries. The spread of other diseases in chickens have been linked to cock fighting in the United States. Since I keep rare and endangered spicese this is a concern of mine.

Animal Protection Group Calls on World Health Organization to Combat Cockfighting as Key Factor in Spread of Avian Flu
Asia Pacific News