Hello, I have three Nigerian Dwarf does that are eight months old and they are getting fat. By fat I don't mean big bellies, they are chunky. Right now, besides free choice minerals, they are only getting local grass hay. I don't restrict it but I am starting to wonder if I should. They are kept in a barn and have access to a small field but there is very little grass. My question is, should I try to find lower quality grass hay or just restrict how much they get? Thanks! P.S. I will try to get photos and weight on them tonight.