I think my two goats are fat, 6 month old Nigerian dwarfs. I feed them a large bowl full of alfalfa hay and about 1/2 cup purina goat chow in the morning and at night. Is this a good diet for them? They also eat our grass, some weeds and such around the yard. Thanks!!! I just read a magazine today that said I shouldn't be feeding them grains at all unless they are milking or preggo...so confused!