All of the responses to NAIS seem to illustrate the fact that you expect jack-booted thugs to infilitrate your property in the middle of the night and slaughter your flocks...this is a conspiratorial view at best and delusional at worst.
The NAIS has one major goal...to prevent the spread of foreign disease throughout the agricultural industry. Identification of herd, flocks, etc. is necessary to assist with quarantine zones and eradication of possibly infected animals. From the website...
"To protect the health of U.S. livestock and poultry and the economic well-being of those industries, we must be able to quickly and effectively trace an animal disease to its source.
When a disease outbreak occurs, animal health officials need to know:
Which animals are involved in a disease outbreak
Where the infected animals are currently located
What other animals might have been exposed to the disease
By choosing to participate in NAIS, you will join a national disease response network built to protect your animals, your neighbors, and your economic livelihood against the devastation of a foreign animal disease outbreak."
This threat is very real today with international travel and I am sure that terrorists would love to infect a few large farms with foot and mouth or classic swine fever. To control such an outbreak, it is imperative that the USDA be able to identify every animal in a threatened zone and if necessary cull those animals. The NAIS is a program that is modelled on several European Union programs that have helped prevent widespread devastation to the agricuture industry in the UK and Germany during disease outbreaks. As someone who was intimately involved in a devastating disease outbreak in Europe in 2003 and seeing the results of rapid response and control of that outbreak I personally support NAIS 100%.
It is an emotional issue when our own animals may be threatened but the logic of such a program is indisputable in today's agricultural arena and threats to our food supply by terrorist organizations.