Male & Female Jack Russell Weights & Heights by Age

Male Jack Russell Weights & Heights by Age

The following chart contains the average weights and heights of a male Jack Russell from newborn to 3 years of age. Please note these are only averages. Always consult with your veterinarian if you have any concerns about your Jack Russell’s growth.

Age	Average Weight (pounds)	Average Weight (kg)	Average Height (inches)	Average Height (cm)
0 months	0.5-1	0.22-0.45	2-3	5-7.6
1 month	2-4	0.9-1.8	4-5	10-12.7
2 months	4-7	1.8-3.2	5-6	12.7-15.2
3 months	6-9	2.7-4.1	6-7	15.2-17.8
4 months	8-11	3.6-5	7-8	17.8-20.3
5 months	9-12.5	4.1-5.7	8-9.5	20.3-24.1
6 months	10-14	4.5-6.4	9-10.5	22.9-26.7
7-9 months	11-15	5-6.8	9.5-11	24.1-27.9
10-12 months	12-16	5.4-7.3	10-12	25.4-30.5
2 years	13-17	5.9-7.7	10-12.5	25.4-31.8
3 years	13-17	5.9-7.7	10-12.5	25.4-31.8

 

Female Jack Russell Weights & Heights by Age

The following chart contains the average weights and heights of a female Jack Russell from newborn to 3 years of age. Please note these are only averages. Always consult with your veterinarian if you have any concerns about your Jack Russell’s growth.

Age	Average Weight (pounds)	Average Weight (kg)	Average Height (inches)	Average Height (cm)
0 months	0.4-0.9	0.18-0.41	2-3	5-7.6
1 month	1.8-3.5	0.8-1.6	3.5-4.5	8.9-11.4
2 months	3.5-6.5	1.6-2.9	4.5-6	11.4-15.2
3 months	5.5-8	2.5-3.6	5.5-7	14-17.8
4 months	7-10	3.2-4.5	6.5-8	16.5-20.3
5 months	8-11.5	3.6-5.2	7-9	17.8-22.9
6 months	9-13	4.1-5.9	8-10	20.3-25.4
7-9 months	9.5-14	4.3-6.4	8.5-10.5	21.6-26.7
10-12 months	10-15	4.5-6.8	9-11	22.9-27.9
2 years	11-16	5-7.3	9.5-11.5	24.1-29.2
3 years	11-16	5-7.3	9.5-11.5	24.1-29.2

These tables are based on general guidelines and can vary greatly depending on individual dogs. Always consult with a veterinarian or professional breeder for more specific information about your pet’s growth and development.

FAQs about a Jack Russell Puppy’s Growth and Development

1. How big will my Jack Russell puppy get? Jack Russells are typically a small breed, with most adults weighing between 13-17 pounds (5.9-7.7 kg) and standing around 10-12.5 inches (25.4-31.8 cm) tall. Their exact size can depend on genetics, diet, and exercise.
2. When do Jack Russells stop growing? Most Jack Russells reach their full height by their first year, but they may continue to fill out and gain weight until they’re about 18 months old.
3. Why is my Jack Russell puppy growing so quickly? Rapid growth in the early months is normal. Proper nutrition and genetics play significant roles in determining growth speed.
4. Are there growth charts for Jack Russell puppies? Yes, there are general growth charts available for Jack Russells. However, always remember that individual growth can vary, and it’s best to consult with a vet for specific concerns.
5. How often should I feed my growing Jack Russell puppy? Typically, puppies should be fed 3-4 times a day until six months old, then reduced to 2-3 times daily as they approach adulthood.
6. My puppy seems underweight. What should I do? Consult with your veterinarian. They can recommend appropriate feeding guidelines and check for underlying health concerns.
7. Is my Jack Russell’s growth spurt affecting their behavior? Growth spurts can lead to increased hunger, sleepiness, and sometimes even clumsiness. If your puppy is acting out of the ordinary, it could be due to a growth spurt.
8. Can overexercising affect my puppy’s growth? Yes. While exercise is crucial, overexercising can potentially damage growing bones and joints. It’s essential to provide moderate and appropriate play for their age.
9. When is the right time to switch from puppy food to adult food? Most owners transition their Jack Russells to adult food around the age of 12 months, but it’s essential to consult with a vet for individual recommendations.
10. Do Jack Russells have specific growth-related health issues? Like all breeds, Jack Russells can have health concerns. Always monitor for signs of joint issues or discomfort, especially during growth spurts.
11. Are growth supplements necessary for my puppy? Most puppies don’t require growth supplements if they’re on a balanced diet. Always consult with a vet before introducing any supplements.
12. My older Jack Russell seems smaller than usual. Is that normal? Dogs, like humans, can lose muscle mass as they age. If you’re concerned, it’s best to check with a vet for underlying health issues.
13. Why is my Jack Russell puppy taller than the breed standard? Genetics play a significant role in a dog’s final size. If your puppy is larger, it might be influenced by their specific lineage or past generations.
14. How can I tell if my puppy is overweight? You should be able to feel your puppy’s ribs without pressing hard but not see them. If you’re concerned, consult with your veterinarian about weight management.
15. Can neutering or spaying affect my Jack Russell’s growth? Spaying or neutering can influence the growth plates’ closure, potentially leading to a slightly taller dog. It’s essential to discuss the best timing with your veterinarian.
16. Is there a difference in growth rates between male and female Jack Russells? Males might be slightly larger than females, but growth rates are generally similar between the sexes.
17. How can I ensure my Jack Russell puppy grows up healthy? Feed a balanced diet, provide regular vet check-ups, and ensure they get moderate exercise as they grow.
18. Is it normal for puppies to have a “lanky” phase? Yes, just like with human teenagers, Jack Russell puppies might go through a phase where they seem all legs, but they’ll typically fill out as they mature.
19. Do Jack Russells have growth plates? Yes, like all dogs, Jack Russells have growth plates, which are soft areas at the end of long bones. These plates harden as the dog matures.
20. How can I track my Jack Russell’s growth? You can maintain a growth chart, measure their height and weight at regular intervals, and compare it with breed standards or consult your vet for insights.