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