My goats are on grain for show. I wouldn't recommend feeding 3 lbs a day if they are just being kept on a maintenance diet. Which basically means what it sounds like, you are maintaining the goat in that current condition. There are really 3 main instances where you need to feed a lot of grain: in growing goats, in lactating or pregnant does, or in goats you are trying to bulk up. Technically speaking if they are adult goats finished growing and not in milk, and they have forage/hay and all necessary minerals available, they don't need feed. Most keepers like to feed some grain for the fat/protein content and for some extra energy. A good feed will keep their weight on and their coat nice and shiny, especially in winter when they burn more body fat trying to stay warm.
Thank you so much, that was very helpful!!
So when they're babies, after being weaned of course, they do need grain?