Mine won't eat straw, any kind, as they know I will cave in and give hay eventually... In severe winter weather two adults can go through a small bale in a day... (when it was -20 I have to say, nothing else in termīs of roughage fed though, and only little concentrate - hot soaked sugar beet shreds mainly, and goats are dry and more than 2 months of kidding).
Mine love good quality haylage, I do buy horsehage for my milk recorders for a couple of days prior to recording.