| Age (mo.) | Simmental, Angus, Charolais, Gelbvieh, Pinzgauer, B. Swiss/Braunvieh | Hereford, Shorthorn, Maine Anjou, Red Poll, S. Devon, Holstein | Speckle Park, Salers, Tarentais | Limousin, Blonde, d’Aquitaine, Galloway | Texas Longhorn |
|---|---|---|---|---|---|
| 12 | 32 | 31 | 30 | 29 | 28 |
| 13 | 33 | 32 | 31 | 30 | 29 |
| 14 | 34 | 33 | 32 | 31 | 30 |
| 15 | 34.5 | 33.5 | 32.5 | 31.5 | 30.5 |
| 16-20 | 35 | 34 | 33 | 32 | 31 |
| 21-30 | 35 | 35 | 34 | 33 | 32 |
**Recommendations by the Western Canadian Association of Bovine Practitioners