I see you're offline, but I'm gonna reply anyway cause a lot of you live in the surrounding states. CDC and other agencies are trying to track bird flu. Last year, millions of chickens on the east coast and midwest died and were destroyed.
What they want: They want to know the whereabouts of all flocks large and small. What it does: In an outbreak, it allows them to quarantine effected flocks AND surrounding flocks to prevent spread.
The good? It prevents folks from moving infected birds, contaminating flocks nationwide and devastating production.
The bad? If you need to sell sick birds or live within a radius of an infected farm and want to chance it, you won't be allowed to move or sell birds. if you register, you give the state the right to quarantine and destroy your entire flock.
Have a look at your state's website.