I personally wouldn't feed them alfalfa as it's a bit rich, especially for male goats. I also wouldn't be feeding them any grain or rations as they can cause stones in the bladder. Most do great on a diet of a good grass mix hay, and some browse.We got our first chickens and Nigerians in April. The goats didn't want to go by anyone the first couple months. Now they run to anyone when we go in the fence. They like you to love on them. Yours will come around, patience.
I am trying to figure out what to give mine in the winter also. I was going to give them alfalfa but I have 5 boys.