Gentle
Brave
Noble
Docile
Protective

Stubborn
Independent
Energetic
Alert
Courageous
Intelligent
Friendly
Responsive
Quick
Joyful
Inquisitive
Cheerful

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

Silky Jacks are moderate shedders, but regular brushing can reduce shedding and maintain coat health.

Choose a Pyrenean Mastiff if you want a top-notch watchdog. This breed takes guarding seriously, and may not require much training, though obedience or guard dog training can improve their skills.

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

Aragonese Pyrenees (Spain)

United States

Mastiff-type

Jack Russell Terrier, Silky Terrier

Dog Registry of America Inc.
Foundation Stock Service
American Canine Association, 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®

1273 A.D.

2000s

Brown

Brown

Black

Black

Pied
White

Black
Gray
Brown
Red
Cream
Fawn
Blue
Silver
White
Pied
Sable
Brindle

Pyrenean Mastiffs have longer coats compared to most dogs.

Silky Jacks are known for their coat length.

A Pyrenean Mastiff can have a litter of 8-12 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 Silky Jack 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.

Pyrenean Mastiffs have average adaptability to changes in lifestyle and living environments compared to other breeds.

Silky Jacks are known for their adaptability and can adjust well to different environments and lifestyle changes.

The Pyrenean 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 Silky Jack breed is generally healthy, occasional vet check-ups are still necessary to address any health concerns.

Hip And Elbow Dysplasia
Gastric Dilation Volvulus (GDV) or Bloat

Patellar Luxation
Tracheal Collapse
Spongiform Leukodystrophy
Subaortic Stenosis

Entropion
Ectropion

Urolithiasis
Legg-Calve Perthes Disease
Canine Cushing’s Disease

CERF
Blood And Urine Analysis
OFA on hips and elbows
Full Body Physical Examination

Blood And Urine Analysis
Diagnostic Imaging
Cardiac Test
Eye and Ear Examination
DNA

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

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

Pyrenean Mastiffs need only a small amount of physical activity, ideal for busy or elderly people or those with limited space.

Silky Jacks need moderate physical activity and are great for families and active individuals.

Pyrenean Mastiffs have moderate energy levels and typical sleep patterns of 12-14 hours per day.

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

Hiking, Herd, Fetching, Searching

Tug-of-war

Pyrenean Mastiffs 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.

Silky Jacks 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.

There's really no limit to how far you walk your dog as long as they're comfortable. For Pyrenean Mastiff, it's at least 10 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 Silky Jack, it's at least 8 miles / week. Just remember to build distance and stamina gradually over time.

Pyrenean Mastiffs require significant grooming, including regular trims and professional grooming assistance to maintain their coat. They may also require frequent bathing to keep their coat and skin healthy.

The Silky Jack requires an average amount of grooming compared to other breeds.

Pyrenean 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, Silky Jack should be brushed at least 2 or 3 times a week (preferably daily) improve shedding.

Pin Brush
Dematter
Comb
Deshedder

Pin Brush
Dematter
Comb
Nail Clipper

For an average 140-180 pound (64 - 82 kg) Pyrenean Mastiff 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 12-15 pound (5 - 7 kg) Silky Jack feed 1 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 Pyrenean Mastiff is somewhere $2.10 - $2.70 per day.

The average cost of a Silky Jack is somewhere $1.10 - $1.40 per day.

The average per month expenses of a Pyrenean Mastiff is between $55 - $73. This makes an average of $660 - $876 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 Silky Jack is between $28 - $42. This makes an average of $336 - $504 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.

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

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

The Pyrenean Mastiff is not suitable for apartments and requires a large yard to thrive. Pent-up energy in small spaces can lead to destructive behavior.

Silky Jacks are good apartment dogs as long as they get enough exercise and stimulation outside of the apartment.

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

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

Pyrenean Mastiffs are generally very friendly towards other dogs, with a happy and affectionate temperament.

Silky Jacks are average in their friendliness towards other dogs, and socialization can help.

Pyrenean Mastiffs are quick to announce strangers and can be standoffish or suspicious.

Silky Jacks are averagely friendly around strangers but benefit from early socialisation.

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

Silky Jacks are popular for their ease of training and quick learning ability.