I finally got my Pad Thai fix this afternoon at the Bedrock restaurant. It was everything Pad Thai should be.
I'm not sure exactly what they offer in front of their spirit houses (besides the Fanta,) but if it's Pad Thai then I completely understand my lunchtime entertainment:
It makes perfect sense that something would eat the food offerings, but the Fanta does more than just evaporate and I'm not sure that chickens have yet developed the ability to use drinking straws. Half a mystery solved, anyway.