Car Chasing 101

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Trotting along the fence line
Panting uncontrollably
Here comes another intruder
I race at it irresistibly

Outmatched in speed and size
I continue onwards alongside
Barking for them to stop
I'm spoiling for a good fight

Racing headlong they proceed
Obviously scared by my voice
My pace now slows a little
Road becoming absent of noise

Surely there will be another
Rolling along before night
Then we will see which is worse
My bark or my vicious bite