An imprecise method to age sheep is by counting their teeth. The following is an approximation:
| Teeth | Age at which teeth are present (in months) |
| 2 – teeth | 15 – 18 |
| 4 – tooth or rising 4 tooth | 22 – 24 |
| 6 – tooth or rising 6 tooth | 28 – 32 |
| Full-mouth (8 tooth) | 36 – 38 months |