Yours eat grass? Lucky mine don’tBe careful feeding grain to the wether. Too much can result in a medical condition where he won't be able to urinate.
My miniature goats get alfalfa hay, pasture and yard grazing in the warm months, occasional scoops of Purina goat and sheep feed, along with a commercial mineral block because I wasn't sure they were getting enough copper. Of course, for YEARS I just provided a salt block and didn't give mineral block, and those goats all did fine.
Having started all gloom and doom, let me just say: "Goats!!! Wheeee!!!" I fell in love with the first Nigerian dwarf/African pygmy cross bottle baby that was put in my arms. Mini goats have been a part of my life for about 20 years, and -- aside from the challenges in keeping them INSIDE fences -- they are delightful creatures. Congrats!