Take the rubbish to the top of the track – a simple task complicated by the sheep who need careful herding away from the cattle grid (observant readers will have noted several themes and this is one of them).  So off we go then, and the sheep will part and move on:

Well you see the problem is that over winter, and since the lambs were born, they have been hefted onto the red (clue) quad bike that the farmer uses to feed them.  What is the colour of our lawn tractor? (less observant readers will need to check out parts one and two of fun with tractors).