Thats true. Throw some rice out. The birds will eat it, and when the rice gets moisture, it will expand, and the bird will also expand. (rumor has it anyways)
A big eating uncooked rice would be the same as a person eating dehyrated food that isn't quite cooked enough. The rice will absorb some moisture from inside the birds stomach. Making them hurt like hell. If the bird eats enough it could kill the bird but w/e. But I don't think it will make the bird expand or anything.