versions of these stories have been doing the rounds since the 1970s.
I remember them from school.
The microchip variant is just updating the nonsense.
You won't be able to find anyone who actually witnessed anything because it never happened.
And hey, dogs will eat dogs quite happily.
I saw two dogs trying to cross a busy road in Mexico and one got run over but I will spare you the detail of the next part of the story.
Everyone gets these stories via someone a mate spoke to, a colleague of the brother in law etc.
Check snopes. They are all in there. Every one of those stories you ever heard in the pub.
http://www.snopes.com/
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