It's not a stretch to say the last few years have been a really tough time to be a sheep farmer .. some farmers were earning so little from wool that it barely covered the cost of shearing. But things could be looking up. Last week's PGG Wrightson National Wool auction saw prices climb to their highest level in 15 years. So what's behind the turnaround, and is it here to stay? Rachel Shearer from PGG Wrightson Wool joins Jesse.