The dog was asked to do a variety of tasks including sitting with the sheep penned in a corner for about 20 minutes, while the farmer decided which to take and which to leave. When the whole thing was over, the farmer whistled and the dog went to him. And the sheep? Well they just went back to munching their lunch totally unconcerned, unfazed and untraumatised - even though half their number were now missing and had no doubt gone to Llangefni abattoir for recycling (ok, not thinking, not thinking!). The sheep are probably both very stupid and very trusting. "All we like sheep ...... ......."