Mentioned this before, and, will continue to do so every time a topic on Viva Pinata comes up...but, I had the misfortune of having a Sour Shellybean enter my garden, this was, around the time I had just started playing. So, working under the impression that the red and black Pinatas were the bad guys, I took decisive action.
So equipped with my shovel I beat the Shellybean several times, till it lay on the grass, gasping in it's death throes. Then...before I made the final strike to end it all, the creature began to emit the most piteous, heart-wrenching wail. I got that awful feeling in my gut, eyes pricked with tears. I had done something monstrous. I tried desperately to do something, to fix the situation. But to no avail, the doctor would not come, after all, this was not one of my pinatas... In the end I did the only thing I could. I silenced it. Put it out of it's misery with a single swing of my bladed implement.
Excellent article though!