Someone threw these cute chickens on a train carriage then fled into the night

Is Borat still inspiring people to do dumb sh*t more than ten years on? 
When an unknown passenger threw two chickens on to a packed train in Sydney, Australia, before fleeing on Wednesday, it seemed a lot like an act of absurdist comedy. But it's a mystery really.
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The chickens, which appeared to be a white silky and Rhode Island red, were left hanging on the floor of the carriage until two nice people picked them up and took them to