All animals proposed for registration must be ear-marked according to the Society’s system as indicated here above. In view of fact that each animal has to be named and registered separately, it is advisable that each animal should bear a distinctive ear number. Pigs should be marked shortly before weaning. The notches should be cut one-eighth of an inch wide and one-quarter to three-eights of an inch deep, at the spot indicated on the key.
One notch on inside of right ear — 1
Two notches on inside of right ear — 2
One notch on outside of right ear — 3
One notch on inside and one on outside of right ear —4
One notch at tip of ear —5
One notch at tip and one inside of right ear — 6
One notch on inside of left ear, one at tip and one on outside of right ear — 18; and so
on.