The greatest risks to the health of livestock on your farm are from other animals or their manure. In order of risk, from highest to lowest, are the following situations:

• Adding new livestock to the farm without a quarantine period.
• Failing to quarantine new additions for at least two weeks, preferably four weeks.
• Failing to require testing for specific diseases prior to addition.
• Failing to require vaccination for specific diseases prior to addition.
• Allowing livestock to return from fairs, shows, or exhibitions without quarantine.
• Allowing other animals (domestic or wild) to contact your livestock, feedstuffs, or water sources.
• Failing to prevent disease transfer via human contact, vehicular traffic, or equipment (including needles and rectal sleeves) used on more than one animal.