Chihuahua Growth Chart: Track Your Pet’s Development

Welcome to the comprehensive guide on dog health and the “Chihuahua Growth Chart.” Whether you’re a proud owner, a breeder, or someone considering bringing this charming breed into your home, understanding the growth and developmental stages of these tiny yet spirited dogs is essential. 

This guide will delve into the intricate journey of a Chihuahua’s growth, from the earliest days as a fragile pup to the mature stages of adulthood. By exploring the milestones, physical changes, and care requirements that mark each phase, you will be better equipped to provide your puppy with the nurturing environment they need to thrive. 

Join us as we chart the fascinating course of a Chihuahua’s growth and help you ensure a happy and healthy life for your pint-sized companion.

Chihuahua Growth Chart

Age of Chihuahua Puppy                                 Weight in Ounces (Oz)
1 week3.75455.56.57899.5
2 weeks55.56.579101112.513.5
3 weeks67891113141617.5
4 weeks789.51113151719.521
5 weeks891113151719.52224
6 weeks91112.51517.520222427
7 weeks101214.51719.52224.52730
8 weeks1113161921.524272933
9 weeks121517.5202326293235
10 weeks131619222528313438
11 weeks141721242731343742
12 weeks151922263033374145
13 weeks162024283236404449
14 weeks172226303439434752
15 weeks192328323741465156
16 weeks202530343944495459
17 weeks212631364146515762
18 weeks222833374348546065
19 weeks232934394450566267
20 weeks243035414652586470
Estimated Adult Weight in Pounds (lbs)2lbs2.5 lbs3lbs3.5lbs4lbs4.5lbs5lbs5.5lbs6lbs
Chihuahua Growth Chart

Stages of Chihuahua Maturity

Stages of Chihuahua Maturity

1. Infancy: 0 to 1 month

During this stage, your dog is a newborn entirely dependent on its mother. Newborn Chihuahuas are tiny, weighing 2.5 to 5.5 ounces and measuring 3 to 4 inches. They spend most of their time sleeping and nursing, allowing rapid growth.

2. Puppyhood: 4 weeks to 1 year

  • Young puppy: 1 to 5 months

During this phase, Chihuahuas experience rapid growth. They start exploring their surroundings, and their baby teeth emerge. By the end of three months, they would have reached about 30% of their adult weight.

  • Older puppies or adolescents: 6 to 12 months

Growth begins to slow down during this period. By 9 months, most Chihuahuas would have reached their adult height, approximately 5.9 to 9.1 inches. They continue to fill out but should only gain significant weight within this point.

3. Adulthood: 2 to 9 years

  • Young adult: 2 to 3 years

This is the period immediately after the dog stops growing. They are at their peak health and physical form during these years.

  • Full adult: 4 to 9 years

By this stage, the Chihuahua is middle-aged. They remain active but may show signs of aging as they approach their senior years.

4. Senior age: 10 years and above

Senior Chihuahuas, especially those over 10 years old, show signs of aging. They may experience health issues like dental problems, arthritis, and joint problems.

Vet Visits For Growth

Vet Visits For Growth

Regular vet visits are essential for monitoring your dog’s growth and overall health. Your vet can provide valuable advice on nutrition, exercise, and any potential health issues affecting your puppy’s growth. 

  • These visits are more than just a chance to track your dog’s size; they are an opportunity for your vet to check for signs of potential health issues, such as dental, heart, and joint problems. 
  • Regular vet visits are also a chance to discuss your Chihuahua’s diet and exercise routine and to get vaccinations and parasite preventatives that are key to keeping your puppy healthy. 
  • Having a good relationship with your vet and feeling comfortable asking questions about your dog’s health and care is essential.

Frequently Asked Questions


In conclusion, the journey through the Chihuahua Growth Chart highlights the incredible transformation these tiny dogs undergo from birth to adulthood. 

Owners can ensure a healthy and thriving companion by tending to their specific needs and milestones, from fragility to vitality. Remember that the growth chart is a guide, and individual Chihuahuas may have their own pace of development. 

By providing love, proper care, and attention to both physical and emotional growth, you’re embarking on a rewarding journey of companionship that will last a lifetime.

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