I recently saw that they reported the MOO Fund paid a 5.6% yield to investors in the last three months
I presume what you refer to as yield is the distribution figure mentioned in crc's Feb snapshot.
That's 5.552 cents per unit.
But note "fund performance" for the 3 mths is -2.38% and the price of a unit is 95.7cents, presumably down from $1.
As I raised above, be careful how you interpret 'distribution' or yield. It could be part of your original money being given back, or your investment is being eroded by negative performance.
As an exercise, work out whether you are ahead if you put $1000 in at inception and closed your account today.
Then compare that to an index fund like STW, which has returned 8.5% since inception of Magic Moo Cow.