Giant dog years to human years
Giant dogs weigh over 90 lb (41 kg), such as a Great Dane or Mastiff. They are usually treated as seniors from about 5.
Dog size
Life stages for giant dogs
- PuppyUnder 1 year
- Growing fast and learning everything. Needs puppy food, vaccinations, and early training.
- Young adult1–2 years
- Nearly grown and full of energy. Training and exercise matter most.
- Adult2–4 years
- Settled, fit, and at their peak. Regular exercise and yearly vet checks keep them there.
- Senior5+ years
- Slower, stiffer, and more prone to health changes. Many vets suggest check-ups twice a year at this stage.
Other sizes
Small dogs Medium dogs Large dogs, or see the chart for all sizes.