1) Desperation
When Mr. Jones got back he immediately went to sleep on the drawing-room sofa with the News of the World over his face, so that when evening came, the animals were still unfed. At last they could stand it no longer. One of the cows broke in the door of the store-shed with her horn and all the animals began to help themselves from the bins.
2) Spontaneous
With one accord, though nothing of the kind had been planned beforehand, they flung themselves upon their tormentors.
3) Element of Surprise
After only a moment or two they gave up trying to defend themselves and took to their heels.