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Experienced pedigree owners and mean age of death per breed.
| Breed | Owner experience | No. dogs | Mean age of death (y) |
|---|---|---|---|
| Boerboel | Breeder | 2 | 4.50 |
| Experienced | 2 | 10 | |
| Bull Mastiff | Breeder | 15 | 10.40 |
| Experienced | 179 | 8.55 | |
| Cane Corso | Experienced | 9 | 7.55 |
| Dogue de Bordeaux | Experienced | 20 | 6.32 |
| Great Dane | Breeder | 2 | 8.50 |
| Experienced | 19 | 7.32 | |
| Mastiff | Breeder | 193 | 8.15 |
| Experienced | 390 | 7.84 | |
| Neopolitan Mastiff | Breeder | 2 | 6 |
| Experienced | 25 | 7.80 | |
| Other Mastiff | Experienced | 31 | 8.06 |
