Size of muzzle: 4 A - Amstaff B4 R4 D0 - Doberman small bitch DH - Datchhund F1 - French Bulldog Big OB1 10 R1 - Rottweiler 6 B0.5 BM - Bullmastiff SH - Shih Tzu D2 EB2 - big English bulldog, short snout big dogs J1 OB4 13 R2L 3.5 8 B3 R3.5 BX1 - Boxer small DD - Great Dane EM2 - English Mastiff M - malinois R0 4L B - Boston Terrier BC - Border Collie RB - Russian Borzoi D1 EB - English Bulldog F2 - French Bulldog Big OB2 11 R1L 6L B1 BT SL - Saluki D3 EM - English Mastiff J2 P - Pitbull R3 9 B3.5 R3L D - Doberman small DD1 - Great Dane small F - French Bulldog 1 R1 5 B0 BG - Beagle RR - Rodesian Ridgeback D1 - Doberman big EB1 - English Bulldog small GSD - German Shepherd OB3 12 R2 2 3 7 B2 BX - Boxer T - Terrier DBD - Dogue de Bordeaux EM1 - English Mastiff 0 R - Rottweiler