Visitors On Farm
Please be aware of people coming onto your farm, especially those that are going from farm to farm (livestock contractors, etc), are a risk at bringing on unwanted pests and disease's.
The last thing you want is something brought onto your farm, that could potentially give you long term pain.
A simple question to the person in the vehicle coming onto the farm is just ask them where they have come from. Remember they can leave, while you potentially could end up with a long term problem.
Go to Farm Biosecurity for more information.