Wheelbarrow Obsession

What is it with Border Collies? Is it just George? Or is this a universal collie thing?

He goes NUTS for wheelbarrows - it's hilarious. He leaps and runs and chases round and round these things as you wheel them to and fro, and he just loves it - in fact, he clearly feels a bit put out if he doesn't get his daily wheelbarrow fix. He always has to have something in his mouth too - he'll grab a stone or a piece of straw before he starts his circular chasing dance. It makes me laugh out loud to watch.

Is it the wheel turning? Is it the squeaky sound? Who knows - but it's wonderful and heart-warming, as so many things about pets are. They really bring a deep joy to life, whatever the reason.