So when I went to get my hay the other day, my hay guy gave me a bale of haylage. I've never used it, but have heard of it, but don't know much about it. I understand that it is good for fibre and that it doesn't contain dust, but that's about all I know. I would be feeding it to my 3 year old and my 25 year old. What are the benefits and what is the downside?