Jackapoo puppies are adorable, and as they grow, you may wonder, when is a Jackapoo fully grown? How big will a Jackapoo get? It’s hard to imagine them growing up. However, the reality is that they do eventually reach maturity and stop growing.
We’ve put together a handy guide to help you understand when your Jackapoo puppy has reached full size and grown into adulthood.
Before scrolling down this guide, “When Is a Jackapoo Fully Grown,” check out related articles from our team at We Love Doodles: What is a Jackador? and Golden Doodle Potty Training Tips.
Jackapoo Heritage
The Jackapoo, also known as a Jackadoodle, is a mix of two breeds: the Jack Russell Terrier and the Poodle.
The Jack Russell Terrier, also known as the Jack Russell, is a small dog breed weighing 13 to 17 pounds and standing 13 to 14 inches tall. The Poodle is a medium-sized dog breed weighing 40 to 60 pounds and measuring 15 to 27 inches tall.
The Jackapoo puppy inherits traits from each parent breed. These include its keen sense of hearing, a strong sense of smell, and ability to make decisions—which makes the Jackapoo very intelligent.
At What Age Is a Jackapoo Full-Grown?
The Jackapoo falls into the small-to-medium-sized group of dogs. A fully-grown Jackapoo weighs between 13 and 26 pounds and will be full grown by 12 months.
The average height of an adult male or female Jackapoo is 10-16 inches tall. Your pet can grow up to about 19 inches long with its legs stretched out straight in front of them.
Jackapoo Growth Chart
There are different significant growth stages for the Jackapoo breed in terms of height and weight. These include the following:
| Projected Size | Newborn | 6 Months | 12 Months |
| Small Jackapoo | 1.5 pounds | 8 pounds | 13 pounds |
| Average Jackapoo | 2 pounds | 12 pounds | 20 pounds |
| Large Jackapoo | 3 pounds | 17 pounds | 26 pounds |
Newborn Jackapoo puppies weigh between one to three pounds. However, they grow at lightning speed—about two to three pounds per month. They reach their full height by eight months old and reach their full weight by 12 months old.
Jackapoos reach their full height and full energy during adolescence. You’ll find your adolescent between 6 to 10 months old, weighing 10 to 13 pounds, and standing eight to ten inches tall. At this age, they need disciplined training and more active playtime that includes exercise and walks.
An adult Jackapoo typically weighs between 13 to 26 pounds. They have an average height of between ten and 16 inches. So, when is a Jackapoo fully grown? Your Jackapoo will reach its full potential size and weight at around one year of age.
How To Track A Jackapoo’s Size and Health
When you get a Jackapoo puppy home, take regular pictures of it in the same position. You’ll want to take photos every three months or so. After every six months, measure your dog’s weight. Measure their length from nose to tail tip and write down these numbers along with the date.
Then keep taking pictures and measuring throughout its life. Keep these records in an organized manner that’s easy for you and your vet to access. Google Drive is great because it allows you to access information about your dog anytime without having copies of all those charts lying everywhere.
Jackapoo Nutrition Needs for Proper Growth
Feed your Jackapoo high quality puppy food, three times a day when possible. Your Jackapoo can experience growth issues without good nutrition or even become obese with overfeeding. For example, if a Jackapoo doesn’t get enough protein, it is more likely to be underdeveloped or have health problems.
Adult Jackapoos are not quite as active as puppies, but they still need to eat well and exercise often to maintain their health. Also, consider giving it smaller meals more frequently throughout the day instead of one larger meal once or twice daily.
The best way to ensure that your dog is growing properly is through regular visits with your vet. Your vet will be able to help you determine what diet is best for your pet’s unique body type and lifestyle so they can live longer, happier lives with you.
Jackapoo Temperament With Age
The Poodle is known for being gentle and playful, while the Jack Russell is energetic and playful. Therefore, you can expect full-grown Jackapoo puppies will have a range of these characteristics of both breeds. Expect your Jackapoo to be active and love to play.
Jackapoo puppies are good with kids and other pets in the house. They have a good temperament and are easy to train. They are very playful and curious about everything around them.
The adolescent Jackapoo will still be a fun, loving dog as they age. However, they may begin to show signs of aggression if not properly trained or given enough exercise. The best way to prevent this behavior is by socializing your dog early in life with other animals, people, and places.
Playing with your adolescent Jackapoo will release some of that energy. It will also train them to put their energy into the right places, such as playing with dog toys instead of slippers. Your puppy will likely grow out of these behaviors as it goes through its teenage years, but it’s essential to set boundaries early on.
A fully-grown Jackapoo may become more protective of the people they love as they grow into adulthood. However, they will still be playful and loyal to you and your family.
Factors That Affect Jackapoo Size and Length of Jackapoos
You may have noticed that some Jackapoos are small, and others are large. This variation may be due to genetics, nutrition, health, and spaying or neutering.
We’ll take a look at each of these factors individually.
Jackapoo Genes
Genes are the building blocks of life. They tell the bodies how to develop and function. They pass down from generation to generation, so you can use them to predict what your dog might look like as an adult.
If you want to know the average size of a Jackapoo, you should look at its parents. Their height and weight can give you an idea of what to expect from your full-grown Jackapoo dog. The closer in size the adult parents are, the better a breeder can guess what your Jackapoo’s size will be.
Spaying or Neutering
Spaying or neutering your Jackapoo too early can have a significant impact on its development. As a result, they may stop producing hormones that would generally stimulate growth hormones in their bodies. If you spay or neuter your Jackadoodle before its growth plates close, it may have joint and growth issues.
An average-sized Jackapoo can likely be spayed or neutered between six to nine months. Larger dogs should wait until 12-18 months. Work with a veterinarian to determine when the best time is to spay or neuter your dog for its growth and size.
Jackapoo Grooming Needs as They Grow
Jackapoos are playful puppies that love to play outside. If your Jackapoo puppy’s fur gets dirty or matted from playing, it’s okay to trim the hair around its eyes and ears with scissors. You can de-shed the rest of their body by brushing or combing them.
As your Jackapoo reaches adolescence and into adulthood, take good care of its coat and clean up any tangles that arise when it’s shedding. Brush their coat daily (or even every other day) so it doesn’t get too matted down or dirty beyond repair.
Most Jackapoos will have developed an adult coat with soft undercoats after the first year. There should be fewer tangles than before, but more shedding overall. You should brush them regularly to prevent matting from occurring again over time.
Frequently Asked Questions
Here are some frequently asked questions to give you more information on Jackapoo sizes.
A fully-grown Jackapoo is expected to grow to 26 pounds. Their height would be about 16 inches tall. If your Jackapoo weighs more or less than these figures, it may point to obesity or malnutrition. Observe your dog’s health as they grow, and see a veterinarian if you’re concerned about your dog’s health.
No, Jackapoo growth varies only slightly between males and females. Males tend to be slightly larger than females, but this is true for most breeds of dogs. Size may vary more for either gender because a Jackapoo is a mixed breed.
Yes, exercise does affect a Jackapoo’s size. If a Jackapoo is allowed to become overweight or obese, it can cause health problems and a shorter life span. Exercise has many benefits for the dog and its owner, so they must get enough exercise daily.
Tracking your dog’s age in human years is one of the best ways to monitor their health, behavior, lifestyle, and other vital factors. You can also use this information as a guide when deciding if your dog needs medical attention or if you should change its diet or daily routine.
The average life expectancy of a Jackapoo is between 12-15 years.
Conclusion For “When Is a Jackapoo Fully Grown”
A full-grown Jackapoo is a sweet and loyal dog. They are great companions for people of all ages. So ensure you provide your Jackapoo puppy with nutritious food, plenty of love, toys, and exercise, and enjoy watching them grow.
If you find this guide, “When Is a Jackapoo Fully Grown,” helpful, check out our other guides:
- Top 6 Jackapoo Breeders in the USA.
- Best Dog Water Bottle for Hiking.
- Best Dog Toys to Keep Your Dog Busy.
If you want to learn more about Jackapoo dog breed, you can by watching “Jackapoo Dog Breed Information – The Olympic Jumper | Jackapoo Dogs 101” down below:
Garrett loves animals and is a huge advocate for all Doodle dog breeds. He owns his own Goldendoodle named Kona. In addition, he volunteers at the Humane Society of Silicon Valley, where he fosters dogs and helps animals. Garrett enjoys writing about Doodles and believes that dogs can teach humans more about how to live than humans can teach a dog.
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