The apparatus 13, wherein {TAIL ~ said aperture} is of a width to permit the head of {HEAD ~ said animal}, but not the shoulder through 
The apparatus 13 , wherein { TAIL ~ said aperture } is of a width to permit the head of { HEAD ~ said animal } , but not the shoulder through
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH