The feed mixer apparatus 6 wherein said first auger includes {TAIL ~ a first set} of {HEAD ~ knives} 
The feed mixer apparatus 6 wherein said first auger includes { TAIL ~ a first set } of { HEAD ~ knives }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD