Protective
Alert
Powerful
Courageous
Intelligent
Docile
Affectionate
Reliable
Loyal
Devoted
Cheerful
Calm

Playful
Intelligent
Friendly
Affectionate
Lively
Gentle
Aggressive
Trainable
Quiet
Faithful

Doubull-Mastiffs are decent watchdogs - they'll alert their owner if something seems amiss.

Avoid Boston Spaniels as watchdogs - they're not effective.

United States

United States

Bullmastiff, Mastiff

Cocker Spaniel and Boston Terrier

ACHC = American Canine Hybrid Club
DDKC = Designer Dogs Kennel Club
DRA = Dog Registry of America, Inc.

ACHC = American Canine Hybrid Club
DBR = Designer Breed Registry
DDKC = Designer Dogs Kennel Club
DRA = Dog Registry of America, Inc.
IDCR = International Designer Canine Registry®

Brown

Brown

Black

Black

Fawn
Brindle

Black
White
Brown
Sable

Doubull-Mastiffs have coats that can be either short or medium in length.

Boston Spaniels have medium-length coats.

A Doubull-Mastiff can have a litter of 4-13 puppies on average. However, it's worth noting that the size of the litters can vary greatly. Factors that can influence litter size include the health of the mother, breeding history, and genetics.

A Boston Spaniel can have a litter of 6-8 puppies on average. However, it's worth noting that the size of the litters can vary greatly. Factors that can influence litter size include the health of the mother, breeding history, and genetics.

Doubull-Mastiffs are known for their adaptability and can adjust well to different environments and lifestyle changes.

Boston Spaniels are highly adaptable and versatile, making them excellent companions for families and individuals of all lifestyles.

The Doubull-Mastiff breed is generally very healthy, requiring minimal vet visits. Still, it's important to keep an eye on their health and seek veterinary care when needed.

While the Boston Spaniel breed is generally healthy, occasional vet check-ups are still necessary to address any health concerns.

Entropion
Elbow Dysplasia
Retinal Dysplasia
Hip Dysplasia
Bloat
Ataxia

Patellar Luxation
Glaucoma
Hip Dysplasia
Intervertebral Disc Disease (IVDD)
Dry Eye

Ectropion
Progressive Retinal Atrophy
Cataracts
Retinal Dysplasia

Cataracts
Hypothyroidism
Heart Murmur

X-Rays
MRI
CT Scan
Eye Examination
Myelography (Dye And X-Ray to Assess The Spinal Cord)

X-Rays
Eye Examination
Electrocardiogram
Complete Blood Count
Thyroid Panel
vonWillebrand’s Disease Test
Buccal Mucosal Bleeding Time (BMBT)

Doubull-Mastiffs are a good choice for a low-key lifestyle due to their low energy levels.

Boston Spaniels thrive on an active lifestyle due to their high-energy nature.

Doubull-Mastiff has average social needs and is less independent than other breeds.

Boston Spaniel has above average social needs and thrives with interaction with humans and other dogs.

Doubull-Mastiffs need moderate physical activity and are great for families and active individuals.

Boston Spaniels require significant physical activity and suit those with an active lifestyle.

Doubull-Mastiffs are known for their relaxed and calm nature and enjoy long periods of sleep.

Boston Spaniels sleep less than other breeds but still need adequate sleep for good health.

Teaching tricks, Fetch, Dog Parks, Hike, Swim, Walk, Tug-of-war, Tug of war, Walks, Swimming, Cuddling

Chase, Cuddling, Nap, Ball play, Tug-of-war, Go to Park, Walk, Groom, Hike, Play, Fetch, Speak, Family Outings, Dog Parks, Eating Snacks, Dressing up, Playdate, Catch treats, Nose work, Tracking, Puzzle Toys

Doubull-Mastiffs are low-energy dogs. This breed make a great companion for a relatively inactive person. Doubull-Mastiff dogs require a few short daily walks, and then they're happy snuggling next to you for the rest of the day.

Boston Spaniels are medium-energy dogs and typically enjoy socializing and playing casual or even sustained games of chase with other dogs. They may also have occasional periods of barking or racing around the house.

There's really no limit to how far you walk your dog as long as they're comfortable. For Doubull-Mastiff, it's at least 7 miles / week. Just remember to build distance and stamina gradually over time.

There's really no limit to how far you walk your dog as long as they're comfortable. For Boston Spaniel, it's at least 8 miles / week. Just remember to build distance and stamina gradually over time.

In general most Doubull-Mastiffs usually need at least 30 minutes of exercise daily. This can be spread across the day and include all sorts of high-energy activities, like walking, running and playing.

In general most Boston Spaniels usually need at least 45 minutes of exercise daily. This can be spread across the day and include all sorts of high-energy activities, like walking, running and playing.

Doubull-Mastiff should be brushed at least once a week. Of course you can give them more frequent brushes if you find that they are still shedding a lot

Ideally, Boston Spaniel should be brushed at least 2 or 3 times a week (preferably daily) improve shedding.

Slicker Brush
Comb
Nail Clipper

Slicker Brush
Comb
Scissors
Nail Clipper

For an average 130-200 pound (59 - 91 kg) Doubull-Mastiff feed 4 cups daily. But, keep in mind, the amount you feed is going to be dependent on the quality of the food you are feeding.

For an average 10-28 pound (5 - 13 kg) Boston Spaniel feed 3 cups daily. But, keep in mind, the amount you feed is going to be dependent on the quality of the food you are feeding.

The average per month expenses of a Doubull-Mastiff is between $112 - $126. This makes an average of $1344 - $1512 per year. It will be on the higher side when the dog is still small because it will need more frequent visits to the vet, shots.

The average per month expenses of a Boston Spaniel is between $48 - $63. This makes an average of $576 - $756 per year. It will be on the higher side when the dog is still small because it will need more frequent visits to the vet, shots.

Doubull-Mastiff is an independent and stubborn breed with low obedience intelligence, making training a test of patience.

Boston Spaniel is highly intelligent and very trainable.

This breed is sensitive and requires gentle handling and a calm home environment.

This breed is sensitive to its environment and best suited for patient and understanding families with a consistent routine.

Doubull-Mastiffs are good apartment dogs as long as they get enough exercise and stimulation outside of the apartment.

Boston Spaniels make excellent apartment dogs, being fairly active indoors and not requiring a yard.

Doubull-Mastiffs are average in their friendliness toward cats and tend to do well with them, especially if raised together.

Boston Spaniels are very friendly with cats and make great companions for them.

Doubull-Mastiffs are less friendly towards other dogs, but can improve with socialization.

Boston Spaniels are generally very friendly towards other dogs, with a happy and affectionate temperament.

Doubull-Mastiffs are averagely friendly around strangers but benefit from early socialisation.

Boston Spaniels are friendly but may bark at strangers, and training is easy due to their intelligence.

Doubull-Mastiffs are not known for being a highly playful breed.

Boston Spaniels are a playful breed that needs daily playtime to be happy.

Doubull-Mastiffs are usually easy to train but require consistency to fully obey commands.

Boston Spaniels are popular for their ease of training and quick learning ability.