Loving
Stubborn
Independent
Energetic
Alert
Courageous
Affectionate
Lively
Inquisitive
Cheerful

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

Jack-Rat Terriers 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.

​United States

United States

Jack Russell Terrier, Rat Terrier

Bullmastiff, Mastiff

​Unknown

Unknown

Brown

Brown

Black

Black

White
Blue
Brown
Red

Fawn
Brindle

Jack-Rat Terriers have short coats.

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

A Jack-Rat Terrier 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.

Jack-Rat Terriers 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 Jack-Rat Terrier 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

Hemivertebrae
Familial Nephropathy
Tracheal Collapse
Diabetes
Von Willebrand's Disease
Hypothyroidism
Cleft Palate
Cutaneous Asthenia
Dilated Cardiomyopathy (DCM)
Persistent Pupillary Membranes (PPM)
Mitral Valve Dysplasia
Eye Conditions

Ectropion
Progressive Retinal Atrophy
Cataracts
Retinal Dysplasia

Dna Test For Vwd
Thyroid Tests
Physical Examination
Eye Examinations
Blood Work
Full Physical Examination regarding joint movement around the hip and kneecap
Heart Rate Tests

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

Jack-Rat Terriers' high energy levels make them unsuitable for a low-key dog, choose accordingly.

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

Jack-Rat Terrier 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.

Jack-Rat Terriers require significant physical activity and suit those with an active lifestyle.

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

Jack-Rat Terriers are active and require sufficient sleep to stay healthy.

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

Jack-Rat Terriers bark moderately when necessary and may also bark due to certain triggers like fear, alarm, boredom, greeting, separation anxiety and compulsive barking.

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

Run, Hike, Tug-of-war, Nap, Fetch, Off-leash, Walking, BREED ISSUES, HER/MINE ISSUES, Sleeping, Eating, Running, Walk, Chase a ball, Playing toys, Playing catch, Cuddeling, Playing fetch, Giving pig ear, Watching tv, Retrival games, Playdate, Frisbee, Wrestling, Chase, Tracking, Park visits, Car rides, Napping, Jogging

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

Jack-Rat Terriers are high-energy dogs. They need mental as well as physical exercise. These dogs require a lot of your involvement and without it they can, and will, become problematic dogs.

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 Jack-Rat Terrier, it's at least 12 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 Jack-Rat Terriers usually need at least 120 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.

Pin Brush
Slicker Brush
Nail Clipper

Slicker Brush
Comb
Nail Clipper

For an average 20-26 pound (9 - 12 kg) Jack-Rat Terrier 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 Jack-Rat Terrier 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 Jack-Rat Terrier 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.

Jack-Rat Terrier 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.

Jack-Rat Terriers 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.

Jack-Rat Terriers 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.

Jack-Rat Terriers are friendly but may bark at strangers, and training is easy due to their intelligence.

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

Jack-Rat Terriers are a playful breed that needs daily playtime to be happy.

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