You can do all of a goats feed with forage if you have a big enough area or much better if you use rotational grazing. I have been using rotational grazing with goats
for two years now. First we used step in posts, twine and tape, but now we are using electronet. We do give a bit of feed each day to the goats. This keeps them very happy
to see us and when we move their electronet, we put feed in the bowls and they come running and go in the new pen. Honestly, they come running as soon as I get near the
bowls to move them to the new pen. We couldn't afford to buy enough electronet to have two complete separate pens.
By the way that moveable goat shelter pictured in a below post is ours

The one with the metal roof. We only use that in the summer and move it with a riding lawnmower although I have threatened to
move it with one of my horses that are broke to drive or a new draft pony. LOL In the winter the goats go in a run in shed that kind of uses a deep litter system. The goats
eat hay in the shed, they drop hay on the ground. They do their business on the hay and sleep on it and things just get deeper and deeper. The hay and manure start breaking down
and by summer it is really nice stuff that can go on a garden. We built that shelter exclusively from materials we pounced on at local auctions at a very cheap price.
All of the goats we own have been bought at the local animal auction. We have not had much in the way of problems with the health of the goats. We don't worm at all when we are rotating
the goats on forage with the electronet as we leave the worms behind.
Even my dairy does who don't go in the rotational pen unless they are dry do quite well on fodder only that is if I can afford to buy alfalfa hay to give them in the winter. Sometimes that
is not possible so other feed is used. I don't use sweet feed.
We use moveable pens for our poultry (although they free range during the day and are on a deep litter system in the winter), rabbits and goats. The horses have three pastures to move through.
This is the first time I have posted on one of these forums. My husband posted the picture of our goat shelter on a forum that he joined earlier this year.
enough for now, gotta go milk a goat

A nigerian by the way with a nice udder that I can use my whole hand to milk not just two finger and a thumb!