Playful
Stubborn
Independent
Energetic
Alert
Courageous
Intelligent
Friendly
Affectionate
Lively
Going
Cheerful

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

Cojacks shed a lot of hair each year, so frequent brushing is essential for reducing shedding and maintaining coat health.

Doubull-Mastiffs are moderate shedders, but regular brushing can reduce shedding and maintain coat health.

Cojacks aren't great guard dogs; they tend to just watch without taking action.

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

​United States

United States

Jack Russell Terrier and Pembroke Welsh Corgi

Bullmastiff, Mastiff

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®

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

​Unknown

Unknown

Brown

Brown

Black

Black

Brown
Black
White
Red
Pied

Fawn
Brindle

Cojacks have short coats.

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

Wiry

Straight

A Cojack can have a litter of 4-8 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.

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.

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

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

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

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.

Patellar Luxation
Deafness
Cardiomyopathy
Patent Ductus Arteriosus

Entropion
Elbow Dysplasia
Retinal Dysplasia
Hip Dysplasia
Bloat
Ataxia

Intervertebral Disc Disease
Hemivertebrae
Tracheal Collapse
Diabetes
Familial Nephropathy
Eye Problems
Von Willebrand's Disease
Hypothyroidism
Mitral Valve Disease
Degenerative Myelopathy
Persistent Pupillary Membrane
Cleft Palate
Cutaneous Asthenia

Ectropion
Progressive Retinal Atrophy
Cataracts
Retinal Dysplasia

Hip X-Rays
Dna For Vwd
Physical Examination
Eye Examinations
Complete Blood Work

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

Cojacks are suitable for those with a balanced lifestyle as they have an average energy level.

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

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

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

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

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

Cojack dogs are generally less vocal than other breeds and only bark when necessary, such as to alert their owner or communicate.

Doubull-Mastiffs are typically quiet and only bark when needed, such as to alert their owner or when in distress.

Walking, Running, Walk, Walks, Walk, play ball, Playing, Herding, Fetch, Tag, Play, Snuggling, Petting, Watching tv, Cuddling, Training, Jogging, Run, Chase, Dance, Car rides, Hike, Bike ride, Cuddles, Nap, Watch tv, Going on walks, Swimming, Road trip, Dog Parks, Barking

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

Cojacks 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.

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.

There's really no limit to how far you walk your dog as long as they're comfortable. For Cojack, it's at least 9 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 Doubull-Mastiff, it's at least 7 miles / week. Just remember to build distance and stamina gradually over time.

In general most Cojacks usually need at least 60 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 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.

Slicker Brush
Comb
Nail Clipper

Slicker Brush
Comb
Nail Clipper

For an average 18-28 pound (8 - 13 kg) Cojack 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.

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.

The average cost of a Cojack is somewhere $1.70 - $2.00 per day.

The average cost of a Doubull-Mastiff is somewhere $3.90 - $4.20 per day.

The average per month expenses of a Cojack is between $49 - $63. This makes an average of $588 - $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.

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.

Cojack is a very intelligent and trainable breed.

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

Cojacks are good with kids if socialized and trained from a young age.

Doubull-Mastiffs make excellent family pets for kids due to their gentle, protective nature and calm temperament.

Cojacks are good with cats, but early training is needed to prevent chasing behavior.

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

Cojacks are friendly and active companions, and can be good family pets, though their friendliness towards other dogs may vary.

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

Cojacks are very playful, so adopting an older one might be a better option for a more relaxed experience.

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