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My dad used to take the dog ploughing.
Our collie used to run about a foot in front of the right front wheel of the tractor all day long. No idea how it didn't get run over.
I also like the fact the dog is clearly checking he is plougha straight furrow, providing feedback.
One bark for right a bit, two barks for left.
Looks like the dog is wearing a flat cap as well.
Just don't let it drive the tractor:
http://www.bbc.co.uk/news/uk-scotland-glasgow-west-32411621
Of course it all gets a lot more complicated when they go to mow a meadow.