只有当每个动物都觉得自己没有被欺骗时，这种合作才有可能是稳定的。

Such co-operation is likely to be stable only when each animal feel it is not being cheated.

youdao

但每个动物都根据自己的能力来工作。

But everyone worked according to his capacity.

youdao

在搬运和堆积牧草时，每个动物都谦逊到极点。

And every animal down to the humblest worked at turning the hay and gathering it.

youdao