This is a pun. A 'snap decision' is made 'on the spur of the moment'. "Snappy" can have a related meaning - quickly: 'Get me some paper, and make it snappy' - the "it" is the process of fetching the paper, not the paper itself.
In the newspaper article though, "snappy" is used to mean 'of such a kind that it keeps trying to bite things'. I'm not sure whether any dictionary would have this sense of "snappy", but I've met it in a rather surreal joke about a crocodile sandwich!
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