Animal suicide.

600 dogs have jumped over Scotland’s Overtoun Bridge and plummeted to their deaths.

While it seems pretty creepy that thousands of dead birds are falling out of the sky, millions of dead fish are turning up, on beaches, it turns out these aren't the only bizarre mass animal deaths that have occurred over the years.

In the past years, 50 to 600 dogs have jumped over Scotland’s Overtoun Bridge and plummeted to their deaths. Five dogs jumped in under six months.The Daily Mail wrote an article featuring reports of horrified pet owners who walked their dog over the bridge, when suddenly the dog would, without warning, leap over the bridge, falling 50 ft to the rocky bottom below. Perhaps even more disturbing, there are reports of “second timers” – of the few dogs who have survived the fall, some jumped over the same bridge again.

Many theories have circulated about why dogs react this way to the bridge. Some suggest that the dogs are deliberately committing suicide, perhaps due to depression in their owners or even a supernatural force. 
Whatever the explanation may be, perhaps dog owners should simply stop walking their dogs over the Overtoun Bridge. 

28 cows decided to leap off a cliff.

In the picturesque Swiss village of Lauterbrunnen, the locals are worried.
Dozens of alpine cows appear to be committing suicide by throwing themselves off a cliff near the small village in the Alps.
In the space of just three days, 28 cows and bulls have mysteriously died after they plunged hundreds of metres to rocks below where they were killed instantly.