Dachshunds grow fast in the first months, then slow down as they reach adulthood. Most Dachshunds finish their main growth by around 8 to 12 months, but many keep filling out in muscle and chest until about 12 to 18 months. The exact pace depends on size, type, genetics, diet, and activity.
Usual growth timeline
Birth to 8 weeks
- Rapid early weight gain.
- Puppies are still with the breeder and growing daily.
- Body shape is rounder and less defined.
2 to 4 months
- The fastest visible growth stage.
- Legs lengthen, body stretches, and weight climbs quickly.
- Many puppies double their weight during this window.
4 to 6 months
- Still growing steadily, but not as explosively.
- Teething and high energy are common.
- Back and chest begin to look more Dachshund-like.
6 to 9 months
- Growth rate slows further.
- Most height and body length are close to adult size.
- They may look lanky or uneven for a while, which is normal.
9 to 12 months
- Most Dachshunds reach adult height and length.
- Weight gain continues at a slower pace.
12 to 18 months
- Final filling out stage.
- Chest deepens and muscle develops.
- Adults look sturdier and more balanced.
Miniature vs standard growth speed
Miniature Dachshunds
- Usually reach full size a bit earlier.
- Most are close to adult weight by 8 to 10 months.
- Often filled out by 12 months.
Standard Dachshunds
- Grow slightly longer overall.
- Main growth ends around 10 to 12 months.
- Filling out can continue for 15 to 18 months.
What is considered fully grown
A Dachshund is usually considered fully grown when their height and length stop changing, and their weight stabilizes. Most reach this point by 12 months, though standards may take a few extra months to finish filling out.
Factors that affect growth rate
- Genetics – puppies from bigger parents often grow bigger and sometimes longer.
- Nutrition – balanced puppy food supports steady growth, while overfeeding can push unhealthy weight gain.
- Health – parasites or illness can slow growth, while rapid growth may happen with excess calories.
- Exercise – safe play builds muscle, but too much jumping can stress growing joints and backs.
How to support healthy Dachshund growth
- Feed a high-quality puppy diet until your vet says to switch to adult food.
- Track weight every 2 to 4 weeks to catch fast gain early.
- Keep them lean – extra puppy weight increases lifelong back risk.
- Limit stairs and high jumps while they grow.
- Schedule regular vet visits to monitor development.
Dachshunds grow quickly in the first 4 to 6 months, then slow down. Most are close to adult size by 8 to 12 months, with full chest and muscle development finishing around 12 to 18 months. Miniatures usually mature earlier than standards. A steady diet, safe exercise, and keeping your puppy lean are the best ways to support healthy growth.