| 1 | 0.5 – 1.5 | 0.23 – 0.68 | Newborn, rapid growth phase begins |
| 2 | 1 – 2 | 0.45 – 0.91 | Starting to open eyes, ears still closed |
| 4 | 2 – 4 | 0.91 – 1.81 | More active, begins weaning |
| 6 | 3 – 5 | 1.36 – 2.27 | Fully weaned, very active |
| 8 | 4 – 7 | 1.81 – 3.18 | Ready for new home, vaccinations begin |
| 12 | 6 – 10 | 2.72 – 4.54 | Growth rate slows, training starts |
| 16 | 8 – 14 | 3.63 – 6.35 | Teething phase, very energetic |
| 20 | 10 – 16 | 4.54 – 7.26 | Close to adult size, consistent training |
| 24 | 12 – 18 | 5.44 – 8.16 | Approaching full size |
| 32 | 14 – 20 | 6.35 – 9.07 | Full adult size reached by many |
| 52 | 15 – 22 | 6.80 – 9.98 | Full adult size, weight stabilizes |