A good read:
Animal ID Makers in Hog Heaven (long but good)
http://www.freerepublic.com/focus/news/1574414/posts
More reading:
All livestock to be registered with state [WI-Yes, fish too] ^
http://www.freerepublic.com/focus/f-news/1509267/posts
Farm trucks must obtain Federal ID
http://www.freerepublic.com/focus/f-news/1489145/posts
Amish oppose animal ID
http://www.freerepublic.com/focus/f-news/1485362/posts?page=53#53
National ID cards: REAL ID goes too far
http://www.freerepublic.com/focus/f-news/1487846/posts
Might want to add this one:
http://www.freerepublic.com/focus/f-news/1766921/posts
They don't call Animal ID the 'Mark of the Beast' for nothing.