Dogs have been used for centuries to gather and herd all kinds of livestock – the large number and variety of herding and droving breeds in existence today attest to the importance of their work.
Herding tests and trials, open to all breeds, require dogs to move a group of animals (ducks, sheep or cattle are the livestock commonly used) through a designated course of gates and into a pen, guided by the commands of their handlers. The dogs must be forceful enough to gain the respect of the stock and maintain control, yet quiet enough not to panic or scatter the herd.
If you haven't tried herding with your Belgian yet you might want to consider it. You are missing out on a wonderful experience - watching your dog gait freely around the stock and do what she/he has been bred to do is absolutely breathtaking.
When you add in the fresh air and spending time with like-minded people you've got the ingredients for what I would call a perfect day.
Herding trials consist of you (the shepherd) and your dog moving the sheep through a defined course. The ultimate objective is to move the sheep calmly and quietly through the "obstacles", and then pen them at the completion.
Of course, things don't always go smoothly in the beginning with started level dogs, but after some lessons you'll find every run just gets better and better.