Table 1 Cross tabulation of hearing status in 1060 English Bull terrier puppies by coat colour, iris colour, gender and parental hearing status
Puppy hearing status | Total | ||||
|---|---|---|---|---|---|
Normal | Unilateral deafness | Bilateral deafness | |||
Coat colour | Coloured | 517 (99.23 %) | 3 (0.58 %) | 1 (0.19 %) | 521 |
White | 149 (79.26 %) | 29 (15.43 %) | 10 (5.32 %) | 188 | |
White with head patch | 271 (80.65 %) | 55 (16.37 %) | 10 (2.98 %) | 336 | |
White with body patch | 5 (100.00 %) | 0 (0.00 %) | 0 (0.00 %) | 5 | |
White with head and body patch | 10 (100.00 %) | 0 (0.00 %) | 0 (0.00 %) | 10 | |
Gender | Male | 494 (90.31 %) | 43 (7.86 %) | 10 (1.83 %) | 547 |
Female | 458 (89.28 %) | 44 (8.58 %) | 11 (2.14 %) | 513 | |
Parental hearing status | Normal in both parents | 436 (91.60 %) | 34 (7.14 %) | 6 (1.26 %) | 476 |
Normal in sire and unknown in dam | 227 (89.37 %) | 20 (7.87 %) | 7 (2.76 %) | 254 | |
Normal in dam and unknown in sire | 108 (94.74 %) | 4 (3.51 %) | 2 (1.75 %) | 114 | |
Unknown in both parents | 181 (83.80 %) | 29 (13.43 %) | 6 (2.78 %) | 216 | |