Male & Female Bullmastiff Weights & Heights by Age

Male Bullmastiff Weights & Heights by Age

The following chart contains the average weights and heights of a male Bullmastiff 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 Bullmastiff’s growth.

Age	Weight (lbs)	Weight (kg)	Height (inches)	Height (cm)
Newborn	1.0 – 2.5	0.45 – 1.13	4 – 5	10.2 – 12.7
1 month	10 – 15	4.5 – 6.8	6 – 8	15.2 – 20.3
2 months	20 – 30	9.1 – 13.6	8 – 11	20.3 – 27.9
3 months	30 – 40	13.6 – 18.1	10 – 14	25.4 – 35.6
4 months	40 – 60	18.1 – 27.2	14 – 18	35.6 – 45.7
5 months	55 – 75	24.9 – 34	17 – 21	43.2 – 53.3
6 months	65 – 85	29.5 – 38.6	19 – 23	48.3 – 58.4
9 months	80 – 105	36.3 – 47.6	22 – 26	55.9 – 66
12 months	95 – 125	43.1 – 56.7	24 – 28	61 – 71.1
2 years old	105 – 135	47.6 – 61.2	25 – 29	63.5 – 73.7
3 years old	110 – 140	49.9 – 63.5	25 – 29.5	63.5 – 75

 

Female Bullmastiff Weights & Heights by Age

The following chart contains the average weights and heights of a female Bullmastiff 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 Bullmastiff’s growth.

Age	Weight (lbs)	Weight (kg)	Height (inches)	Height (cm)
Newborn	0.9 – 2.0	0.4 – 0.9	3.5 – 4.5	8.9 – 11.4
1 month	8 – 12	3.6 – 5.4	5.5 – 7.5	14 – 19
2 months	18 – 25	8.2 – 11.3	7 – 10	17.8 – 25.4
3 months	27 – 37	12.2 – 16.8	9 – 13	22.9 – 33
4 months	35 – 50	15.9 – 22.7	12 – 16	30.5 – 40.6
5 months	45 – 60	20.4 – 27.2	15 – 19	38.1 – 48.3
6 months	55 – 70	24.9 – 31.8	17 – 21	43.2 – 53.3
9 months	65 – 85	29.5 – 38.6	20 – 24	50.8 – 61
12 months	75 – 95	34 – 43.1	22 – 26	55.9 – 66
2 years old	85 – 110	38.6 – 49.9	23 – 27	58.4 – 68.6
3 years old	90 – 115	40.8 – 52.2	23 – 27.5	58.4 – 69.9

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 Bullmastiff Puppy’s Growth and Development

1. How big will my Bullmastiff puppy get when fully grown?

Bullmastiffs are a large breed. Typically, adult males can weigh up to 130 lbs (59 kg) or more, while females can weigh up to 120 lbs (54 kg). Height at the shoulder ranges between 24-27 inches for males and 24-26 inches for females.

2. When will my Bullmastiff puppy stop growing?

Most Bullmastiffs will reach their full height by 18 months. However, they might continue to fill out and gain weight until they’re around 2-3 years old.

3. How much should I feed my growing Bullmastiff puppy?

The amount will vary depending on the age, activity level, and specific brand of food. It’s essential to follow feeding guidelines on the puppy food package and regularly consult with your veterinarian.

4. What growth-related health concerns are common in Bullmastiffs?

Due to their size, Bullmastiffs can be susceptible to hip and elbow dysplasia. Regular vet check-ups and X-rays can help detect these conditions early.

5. Should I be concerned if my Bullmastiff’s growth rate seems fast?

Rapid growth can lead to joint problems. Ensure your pup’s diet is well-balanced and not overly high in calories. If concerned, always consult your veterinarian.

6. Are Bullmastiffs late bloomers in terms of growth?

While they might achieve most of their height by 18 months, they continue to mature and fill out until they’re about 2-3 years old.

7. How can I ensure my Bullmastiff has strong bones and joints during growth?

Feed them a balanced diet, avoid excessive jumping or hard play on hard surfaces, and provide joint supplements if recommended by your vet.

8. When should I switch from puppy food to adult dog food?

For Bullmastiffs, transitioning usually happens around 12 to 18 months. Consult with your vet to decide the best time and food type.

9. How can I tell if my Bullmastiff puppy is overweight?

If you can’t easily feel the ribs without pressing hard or see a waist when viewing your dog from above, your dog might be overweight. Always check with a veterinarian for an accurate assessment.

10. Are Bullmastiffs prone to obesity?

Yes, like many larger breeds, they can be prone to obesity, especially if overfed or not exercised regularly.

11. What’s the average lifespan of a Bullmastiff?

Bullmastiffs generally have a lifespan of 8-10 years. Proper care, diet, and regular vet check-ups can contribute to a long, healthy life.

12. How often should my Bullmastiff puppy be exercised?

While they need regular exercise, avoid intense activities while they’re still growing to protect their joints. Short, daily walks and play sessions are ideal.

13. When will my Bullmastiff puppy lose his baby teeth?

Like most breeds, Bullmastiffs will typically start losing their baby teeth around 3-4 months of age.

14. At what age is a Bullmastiff considered an adult?

While they may reach physical maturity around 2-3 years of age, they might not reach mental maturity until around 3-4 years.

15. How often should I take my Bullmastiff puppy to the vet for growth check-ups?

In the first year, monthly vet visits are common. After the first year, regular annual check-ups are typical unless concerns arise.

16. How can I prevent my Bullmastiff puppy from developing behavioral problems as he grows?

Early socialization, obedience training, and consistent boundaries are crucial for raising a well-behaved Bullmastiff.

17. My Bullmastiff puppy seems taller/shorter than the average. Should I be worried?

All dogs grow differently. As long as your vet confirms your puppy is healthy, slight deviations from the average shouldn’t be a concern.

18. Can neutering or spaying affect my Bullmastiff’s growth?

There’s some evidence suggesting early neutering or spaying can affect a dog’s growth plates, potentially causing them to grow taller. It’s best to discuss the optimal timing with your veterinarian.

19. What toys are suitable for my growing Bullmastiff puppy?

Durable chew toys that can’t be easily torn apart are ideal. This helps with teething and prevents the ingestion of small parts.

20. Is crate training recommended during my Bullmastiff’s growth period?

Yes, crate training can provide a safe environment for your Bullmastiff and also aids in housebreaking and behavior training. Ensure the crate is size-appropriate as your puppy grows.