Of course...

"...the problem the animals could not at first solve was how to break up the stones into pieces of suitable size... Only after weeks of vain effort did the right idea occur to somebody - namely to utilize the force of gravity. Hugh boulders, far too big to use as they were, were lying all over the bed of the quarry. The animals lashed ropes round these, and then all together, cows, horses, sheep, any animal that could lay hold of the ropes - even the pigs sometimes joined in at critical moments - they dragged them with desperate slowness up the slope to the top of the quarry, where they were toppled over the edge... By late summer a sufficient store of stone had accumulated, and the building began, under the superintendence of the pigs." *

<b>Animal Farm</b>. Chapter Six :-)