Quick Links: Table of Contents
- Average Litter Size of Bullmastiff
- Calculator to Predict How Many Puppies Bullmastiff Will Have
- How Much Does the Bullmastiff Puppy Weigh at Birth?
- How Big Will a Bullmastiff Puppy Get?
- How Much is a Bullmastiff Puppy
- How Long is a Bullmastiff Pregnant?
- How to Ensure a Successful Pregnancy in Bullmastiff
- Conclusion on Bullmastiff Litter Size
Average Litter Size of Bullmastiff
Researchers from the Norwegian School of Veterinary Science did a study where they counted the numbers of puppies in 16 different Bullmastiff birth litters.
From this study, the researchers found that the average number of puppies that Bullmastiffs can have is 6 puppies. Also, the Bullmastiff can have as few as 1 puppies per litter and as many as 20 puppies per litter.
See how the litter size of the Bullmastiff compares to that of other dog breeds below:
Read this article to learn about how many puppies dogs have.
Calculator to Predict How Many Puppies Bullmastiff Will Have
Bullmastiff Litter Size Predictor
According to the result of the research carried out by researchers from the Norwegian School of Veterinary Science, the number of puppies a Bullmastiff will have depends on the following main factors:
- The size of the breed (most important factor): Giant dog breeds tend to have a bigger litter size, while smaller breeds give birth to a smaller number of puppies
- The method of mating: Natural mating results in a larger litter size than artificial insemination.
- The age of the female dog: Check out the chart below to see how many puppies a female Bullmastiff is likely to have at different ages.
According to research, the following factors do not affect litter size:
- The time of the year of the litter was born (season of birth): Although, from the study, litters born in the Spring seem to be larger than litters from other seasons, however, the difference was not of significance.
- The number of times a female dog has given birth in the past (known as parity): The age of the female dog is more important to the extent that it makes parity insignificant.
Based on the important factors that affect litter size, the researchers from the Norwegian School of Veterinary Science developed formulas for predicting the litter size of dogs.
We have developed the Bullmastiff litter size calculator above based on their formulas. Use the calculator to predict how many puppies a Bullmastiff will have based on the age, and method of pregnancy for a Bullmastiff
The calculator tells you how many puppies your Bullmastiff will have if your Bullmastiff gets pregnant today. The calculator assumes that the length of pregnancy will be two months.
Note that we are NOT in any way encouraging you to breed your Bullmastiff. Dog breeding requires expertise. If you want to be breeding dogs, get the necessary training. Also, work closely with a veterinarian when breeding a dog.
The table below shows the average litter size to expect from a Bullmastiff at different ages. This table applies to a Bullmastiff that conceives through natural mating.
| Age (Years) | Average Litter Size | Litter Size Range |
|---|---|---|
| 2 | 8 puppies | 6 to 9 puppies |
| 3 | 7 puppies | 6 to 9 puppies |
| 4 | 7 puppies | 5 to 10 puppies |
| 5 | 7 puppies | 4 to 10 puppies |
| 6 | 7 puppies | 4 to 10 puppies |
| 7 | 6 puppies | 3 to 10 puppies |
| 8 | 6 puppies | 2 to 10 puppies |
| 9 | 5 puppies | 1 to 9 puppies |
How Much Does the Bullmastiff Puppy Weigh at Birth?
Veterinarian researchers did a study to find out how much Bullmastiff puppies weigh at birth. These researchers weighed 22 Bullmastiff puppies at birth.
Based on the study of the weight of 22 Bullmastiff puppies, the average weight of the Bullmastiff at birth is 597 grams (21.1 ounces). The birth weight of the Bullmastiff puppy typically ranges from 579 grams (20.4 ounces) to 630 grams (22.2 ounces).
16 ounces equal one pound.
The factors that affect the weight of a Bullmastiff puppy at birth include the size, weight, and age of the mother.
Importantly, research has also shown that female dogs that give birth at ages between 2 and 8 years give birth to puppies that are heavier than puppies birthed by younger or older female dogs.
How Big Will a Bullmastiff Puppy Get?
A Bullmastiff puppy will grow up to weigh around 100 to 130 pounds. Furthermore, a Bullmastiff puppy will grow up to be 24 to 27 inches at the shoulder.
Learn more about Bullmastiff weight and how big Bullmastiffs grow here
How Much is a Bullmastiff Puppy
The average price of a Bullmastiff puppy is $2230. The price of a Bullmastiff puppy ranges from $1500 to $3000.
Since the Bullmastiff has an average litter size of 6, therefore a Bullmastiff litter birth is worth $13380.
To learn more about the price of Bullmastiff puppy, check our review on how much Bullmastiff puppy cost, and Bullmastiff buying advice.
How Long is a Bullmastiff Pregnant?
Bullmastiffs are pregnant for 63 days on average (2 months) after conception. However, this is an average value. The length of pregnancy in Bullmastiffs can range from 58-68 days.
However, note that it is difficult to know the exact day that your Bullmastiff conceives because conception may not happen at the same time that mating happens.
Sperm can live inside a female Bullmastiff for several days after mating before conception occurs.
How to Ensure a Successful Pregnancy in Bullmastiff
To ensure that your Bullmastiff successfully gets pregnant and deliver its puppies, here at the things you can do:
- Feed your Bullmastiff well: A good diet will ensure that your Bullmastiff has the nutrients and the energy it needs to get pregnant and maintain the pregnancy.
- Make sure your Bullmastiff is in good health: Ensure you take your Bullmastiff to the Vet care regularly for checkups, make sure your Bullmastiff gets regular exercise. Also, make sure that your is not overweight or underweight.
To learn how to check if your Bullmastiff is overweight or underweight, check out this resource.
Conclusion on Bullmastiff Litter Size
Bullmastiffs can have 6 puppies per litter birth on average. The number of puppies that a Bullmastiff will have depends on factors such as the age of the Bullmastiff and the method of pregnancy (natural or artificial insemination).
Breeding Bullmastiffs the right way requires expertise and should be done after sufficient training.
Also, you should work closely with a veterinarian when breeding a Bullmastiff. There are a lot of nuances involved in breeding a dog, which we do not have the time or the space to discuss here.
However, working with a veterinarian will ensure that your Bullmastiff gets the right treatment necessary to make healthy puppies.
The litter size research study that we used for this article was conducted on Bullmastiffs in Norway. However, the authors of the research believe that the results can be generalized to other countries that have similar dog management systems as Norway.