Help me please, i need an idea for a link between these two sentences:?

The wolves are wily, sheep have always been their prey. It is my job to discourage them twenty-four hours a day. Night-times are the hardest, when they creep about the byre soundlessly, waiting for an opportunity. But the most ghastly thing I have ever witnessed is not the opaque outline of the smart and stunning wolves on the shade of the dark, luminous full moon.