First cutting hay is the high fiber stuff. It isn't as fattening as the later cuts, but has more of the flowery heads. It is not quite as soft as the 2Cnd and 3rd cut. It is meant for animals who have chronic GI/digestive tract issues, and require as much fiber as possible. 1St cutting timothy hay - high fiber and great quality! quality characteristics of 1St cutting "high fiber": 1. Higher fiber than any other cutting 2. More flower heads than any other cutting 3. A little more stem than 2Nd cutting, but still very soft and Leafy.