Fearns Farm Premium Hay. Our dust extracted Premium Hay is made from a timothy rye grass mix for a more palatable product. It is high fibre whilst being low protein and low energy. Being first cut, the hay is the best of the season. Dust extracting is very important to us, as so many modern day horses suffer from conditions such as COPD and RAO. A high fibre diet is vital to help prevent dental problems, digestive upset and obesity.