It's an appealing theory--but the tree is inside a bird netting enclosure with 3/8 inch mesh--so no hawk can squeeze inside, nor drop a mouse through the netting from outside. I'm guessing the mouse, seeing the fig, settled down to wait for it to ripen, and knowing how good it would taste, wasn't willing to leave--even to go get a drink of water. In short, he lost his head over a fig (something many of us can relate to), and it cost him dearly. When the fig finally ripened, it was already too late for our fuzzy friend, and something else came along and chewed the hole in it.