I have a good sized garden and being summer here, I have lots and lots of stuff to share with the goats. Can I be using this to replace some of the hay? I'm paying up to AU$20.00 at the moment for small bales of decent hay!!!! Bit of a drought going on. I've been cutting back a little on their hay and increasing the veggies. Doesn't seem to be affecting milk supply. But reading that the goats need their roughage which always refers to hay in what I'm reading, should the veggies just be a treat? They are grain fed at milking time as well. They spend the day browsing in about an acre of native vegetation and small patches of blackberries.