I agree with Tom. Some people supplement the mazuri more in the winter when the natural grass is limited depending on where you live. I think the soaked mazuri is a good way to mix with the natural environment foods and get them to eat grass/weeds.
all mine(including baby Zora who's a sullie) get it about three/four times a week right now since its winter but spring/summer they only get it twice a week since its nice outside and theres lots of good stuff to eat.