Its been known about for years, animals and humans alike have physiological reactions to lunar variations.
From the British Medical Journal (I.E. a proper source!):
"In England, researchers doggedly examined the records of 1,621 animal bite cases at the emergency room of the Bradford Royal Infirmary, a public hospital. Eleven of the injuries were inflicted by rats, 13 by horses, 56 by cats and the rest by man's best friend.
Here's the real news: Not only are animals twice as dangerous during a full Moon, they seem to warm up their canine teeth (or their homologues) in the days prior."


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