Jack Russell Terrier vs American Molossus - Breed Comparison

American Molossus is originated from United States but Jack Russell Terrier is originated from United Kingdom. American Molossus may grow 28 cm / 12 inches higher than Jack Russell Terrier. American Molossus may weigh 40 kg / 89 pounds more than Jack Russell Terrier. Both American Molossus and Jack Russell Terrier has almost same life span. Both American Molossus and Jack Russell Terrier has same litter size. American Molossus requires Moderate Maintenance. But Jack Russell Terrier requires Low Maintenance

Basic Information

Group:
Molosser dogs
Terrier dog
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United States
United Kingdom
Height Male:
56 - 66 cm
22 - 26 inches
25 - 38 cm
9 - 15 inches
Height Female:
51 - 60 cm
20 - 24 inches
25 - 38 cm
9 - 15 inches
Weight Male:
38 - 48 kg
83 - 106 pounds
6 - 8 kg
13 - 18 pounds
Weight Female:
32 - 43 kg
70 - 95 pounds
6 - 8 kg
13 - 18 pounds
Life Span:
10 - 14 Years
12 - 16 Years
Litter Size:
6 - 8
4 - 8
Size:
Giant
Small
Other Names:
American Molosser • American Brabanter • American Bullenbeisser
JRT, Jack
Colors Available:
Colors are black, black brindle with some white
black, White with orange or fawn colored patches - tri-color - white, tan
Coat:
coat type coarse, dense, smooth and long
Short and smooth or longer and rough
Shedding:
Minimal
Moderate
Temperament:
Alert, Courageous, Independent, Intelligent, Loving, Loyal, Protective, Quiet, Territorial
Affectionate, Aggressive, Alert, Cheerful, Courageous, Curious, Energetic, Friendly, Independent, Intelligent, Lively, Loving, Loyal, Outgoing, Playful, Protective, Responsive, Social, Stubborn, Territorial
Grooming:
Moderate Maintenance
Low Maintenance
Trainability:
Moderate
Easy
Hypoallergenic:
No
No
Kids Friendly:
Yes
Yes
New Owners Friendly:
No
Yes

History

Based on the massive dog of Mesopotamia in 5000 BC, the American Molossus is the same dog recreated in the United States by and for the lovers of these giant dogs. The ancient Molossus was fierce to look at, massive in size, courageous and loyal. He was undaunted by any animal and stood up to any man attempting to hurt his master. When Rome fell the descendants of today’s Molossus were scattered and attempts to revive the breed have created carious large dogs. The American Molossus is the first true recreation that hits the mark.

The original Molossus was one of the most primitive of dogs, one of the earliest dogs that men domesticated. Their initials duties were the guarding of herds and homes against all enemies. They were incredibly loyal to their one master and stayed with him and protected him. These dogs also ate carrion and served the villages by eliminating animal carcasses. They could handle any other hunting animals such as wolves and large cats. This dog, although extinct was the ancestor of all the Mastiff-type dogs of today. The Molossus is said to be the ancestor of the St. Bernard, English Mastiff, Greater Swiss Mountain Dog, Bernese Mountain Dog, Newfoundland, Great Dane, Great Pyrenees, Rottweiler, Rottweiler and the Neapolitan Mastiff. Now these breeds have become the ancestry of the American Molossus.

According to Marcus Curtis, the founder of the new Molossus, the nearest relative of the American Molossus is the Neapolitan Mastiff. The Hines Bulldog, German Rottweiler, American Bandogge, and South African Boerboel together with the Neapolitan Mastiff were used to form the American Molossus. The goal of the founder was to make a great family pet and protector. It was specifically bred to be courageous, loyal and protective.

jack russell terrierThe popular Jack Russell Terrier was developed in Devonshire in the south of England in the late 1800's so as to hunt foxes.

Often believed to be the Parson Russell Terrier, the Jack Russell Terrier was developed by Parson John Russell. This is where the dog gets his breed name from. Some people get the Jack Russell Terrier a little bit mixed up with the Parson Russell terrier, when it fact its actually a different breed, but sharing a common ancestry.

The Jack Russell Terrier is smaller than the Parson and bigger than the Russell Terrier. The breed became known in the U.S. by the 1930s and the Jack Russell Terrier Association of America wanted recognition by the American Kennel Club, which was granted in 2000.

Description

This is a giant, massive dog in every way and this recently developed standard makes that very clear. The Molossus should be heavy bones, muscular with a lot of loose skin and wrinkles of all kinds, everywhere. He is an intimidating presence, with a massive square head, broad shoulders, height and mass. No, the American Molossus is not athletic, but he certainly is intimidating.

His head is massive in comparison to his body and it must be square. He has extensive wrinkles and pendulous lips and dewlap. The face is all folds of skin and wrinkles. Deep set eyes, drooping upper lids and lower lids as well as an intimidating expression. His brow is well developed with a marked frontal furrow. The nose is large, and the muzzle is about a third of the length of its head. It is short and broad. Everything about the head must be square. It’s neck and body are powerful and muscular. The chest is deep, wide and barrel like. The back is also powerful and muscular. The front legs are heavy and muscular while the hind legs are broad, strong, powerful and wide-stance. Do not remove the front dew claws. His tail is thick and wide then gradually tapers at the tip.

jack russell terrier puppy - descriptionThe Jack Russell Terrier is a small dog that weighs between 6 and 8kg and stands at between 25 – 38cm. The body length of the dog should be in proportion to the height.

He is essentially a white dog with orange or fawn colored patches. The coat is mostly smooth and short, but the coat can also be longer and rough or it can be broken which is a combination of rough and smooth. Regardless of coat type, they are dense, double coats which will require brushing at least twice a week to remove loose hairs. He may also be tri-colored such as being white with black and tan patches.

He has alert, bright dark brown eyes and ears which are somewhat erect and which flop over at the tips. The tail has always been traditionally docked, giving him an attractive, compact look about him but unfortunately the tail is often left long on the dog these days.

Temperament:

Your Jack Russell Terrier is a lively, tenacious, bold, fearless, feisty, cheeky, confident, independent, intelligent and full of life dog. He is super energetic and exuberant, spirited and full of personality.

There are some dog owners who are exhausted by him and would prefer a more quieter dog breed as their companion. Nonetheless he has some excellent characteristics such as being a totally devoted and loving dog.

It is why it is a good idea to have him trained and socialized as it calms him down and makes him more obedient. He is very intelligent and training him will be easy.

Characteristics

The American Molossus is an intimidating massive giant bred for protection and guard duty. He is incredibly loyal to his family and courageous in his protection of them. They are guard dogs, not attack dogs. Their simple appearance is usually enough to frighten off anyone intending harm on their families. He is in reality a loving giant. He is intelligent and stable with a strong desire to please his owner. He is a calm yet vigilant presence in the home.

Because the Molossus is so large, it is recommended that the puppy be socialized and trained professionally. It takes a strong owner to handle this breed. They need to know the rules and have the rules consistently applied. The owner must be the pack leader.

jack russell terrier dog - characteristicsWith loads of vibrant personality, the energetic Jack Russell Terrier has got so many wonderful characteristics to his name – devotion, intelligence, charming, lively, playful and he is an entertainer – you’ll always be laughing a him.

You do need to pay him attention – you can’t just plonk him in your backyard and forget about him. He wants your love and attention and ignoring him can lead to problem behavior such as obsessive barking.

Give your Jack Russell Terrier all the love and care he needs, and you’ll have an exceptional pet and friend.

Health Problems

Like all Mastiffs the American Molossus faces a variety of potential illnesses, some brought on by its size, some not.

Spondylosis

This could easily be a function of its massive size. It is a degenerative disease and can cause the dog to become lame. In many cases the vertebrae can fuse, or severe pain can result. This is mostly seen in older members of the breed.

Cystinuria

Male Molossus can contract this inherited metabolic disease primarily. It can be life threatening and very serious as it affects the kidney and the bladder.

Wobblers Syndrome

This is essentially Cervical Vertebral Instability (CVI) and is caused by the pressure of the nerves in the neck and cervical spinal cord. This compression can cause deformity, pain and abnormal stance/gait. IT has been attributed to the nutrition needs and rapid growth of the Mastiff breeds.

Like all giant Mastiff breeds the Molossus can have skin issues from the wrinkles, dysplasia in the joints which we will address below.

jack russell terrier puppies - health problemsThis particular dog breed has a reputation for being healthy and living to a good age such as 16 or 17 years of age. Of course he needs to be given proper care to reach such a good age.

Some common dog disorders you might want to be aware of are -

Eye disorders:

Lens luxation is actually a common hereditary disorder in these dogs, but even so, with good care, your dog isn’t likely to battle with it. What happens is that the lens in the eye becomes displaced. There are two types, with Posterior luxation being the lesser severe one.Treatment is available.

Musculoskeletal conditions:

Patellar luxation is an hereditary disorder affecting the knees of the dog. The kneecap slips off the groove where it sits and you may notice your dog running while holding his hind leg in the air. It can sometimes slip back in place and then you see your dog running in his usual way. It becomes more serious when it affects both legs.

Caring The Pet

Feeding

Remembering that this is a very, very large dog you need to be careful about nutrition and how fast your puppy will grow. American Molossus puppies need four meals a day until 12 weeks old. Then until they are 6 months old feed then 3 times a day. Finally, from 6-month-old puppy to adult – feed them twice in 24 hours.

At one year either feed them once or two small meals.

Many people feed their Molossus eggs, vegetables, fruit, and cottage cheese as ten 5 of the total for the day but avoid other table foods. The Molossus can become very picky about what he eats if you feed him too many table scraps.

Health issues

In addition to the health problems listed above, the American Molossus is also susceptible to: Ditichiasis – Eyelashes that are in the margin of the eyelids and can cause eye irritation. May require surgery to correct.

Cataract

Could cause blindness if not removed. Ectropian/Entropion: Eversion and inversion of eyelids which cause ocular irritation.

PRA or Progressive Retinal Atrophy

This is a degenerative disease which causes the dog to go blind. It is a disease the affects the retinal visual cells, first causing night blindness then day blindness. A DNA test is available for detecting PRA in all Mastiff breeds.

Dysplasia of the Elbow or/and the Hip

Common in large breeds and especially in giant breeds like the Molossus. Multiple forms and causes but all can cause pain and lameness.

Skin issues

Do to wrinkles and loose skin – check often for moisture and infections.

Panosteitis or Wandering Lameness

The is a problem based on a variety of possible causes. It happens when the puppy is between 6-16 months of age. Lameness occurs over time in one limb or in all. It can be intermittent and might be caused by diet, genetics, stress, autoimmune or metabolic issues or infection.

HOD or Hypertrophic Osteodystrophy

This issue is developmental as the dog’s toes turn either inward or outward, then as the condition advances the dog suffers fever, pain in all joints, lethargy and the inability to stand. This happens when the dog consumes too many calories for his activity level in the development times.

Exercise and games

The American Molossus is not a couch potato. He needs to be walked at least twice a day and loves to play fetch. He will be greatly benefited by obedience training. Do not overdo it with exercise but make sure they don’t just lay around.

Exercise:

jack russell terrier dogs - caringThe Jack Russell Terrier isn’t just a small dog that can be left to his own devices. He will need proper training and socialization early in life to make him obedient and better to get on with.

He may be a small dog, but he certainly won’t do in the city where he is cooped up in a place with a handkerchief of a garden. He needs lots of space to run and play. He wants his human family to join in with walks, hikes, ball games and swimming.

Diet:

You can buy excellent commercially manufactured dog food which caters for energetic small dog breeds like the Jack Russell Terrier.

Once you have selected the best one for your pet, with dry kibble being better in terms of dental health - you can also add in some brown rice, vegetables and cooked chicken. This is highly beneficial to all dog breeds. A little bit of raw meat can sometimes be added in too.

The bottom line is to to prevent your pet from eating foods high in preservatives, additives and fillers. Never leave your pet without a constant supply of fresh, cool water.

Comparison with other breeds

  1. American Molossus vs English Bulldog - Breed Comparison
  2. American Molossus vs German Shepherd - Breed Comparison
  3. American Molossus vs Golden Retriever - Breed Comparison
  4. American Molossus vs Labrador Retriever - Breed Comparison
  5. American Molossus vs West Highland White Terrier - Breed Comparison
  6. American Molossus vs French Bulldog - Breed Comparison
  7. American Molossus vs Beagle - Breed Comparison
  8. American Molossus vs Yorkshire Terrier - Breed Comparison
  9. American Molossus vs Poodle - Breed Comparison
  10. American Molossus vs Rottweiler - Breed Comparison
  11. American Molossus vs Boxer - Breed Comparison
  12. American Molossus vs English Pointer - Breed Comparison
  13. American Molossus vs Siberian Husky - Breed Comparison
  14. American Molossus vs Doberman Pinscher - Breed Comparison
  15. American Molossus vs American Bully - Breed Comparison
  16. American Molossus vs Abruzzenhund - Breed Comparison
  17. American Molossus vs Affenpinscher - Breed Comparison
  18. American Molossus vs Afghan Hound - Breed Comparison
  19. American Molossus vs Aidi - Breed Comparison
  20. American Molossus vs Airedale Terrier - Breed Comparison
  21. American Molossus vs Akbash Dog - Breed Comparison
  22. American Molossus vs Akita - Breed Comparison
  23. American Molossus vs Africanis - Breed Comparison
  24. American Molossus vs Askal - Breed Comparison
  25. American Molossus vs Atlas Terrier - Breed Comparison
  26. Jack Russell Terrier vs English Bulldog - Breed Comparison
  27. Jack Russell Terrier vs German Shepherd - Breed Comparison
  28. Jack Russell Terrier vs Golden Retriever - Breed Comparison
  29. Jack Russell Terrier vs Labrador Retriever - Breed Comparison
  30. Jack Russell Terrier vs West Highland White Terrier - Breed Comparison
  31. Jack Russell Terrier vs French Bulldog - Breed Comparison
  32. Jack Russell Terrier vs Beagle - Breed Comparison
  33. Jack Russell Terrier vs Yorkshire Terrier - Breed Comparison
  34. Jack Russell Terrier vs Poodle - Breed Comparison
  35. Jack Russell Terrier vs Rottweiler - Breed Comparison
  36. Jack Russell Terrier vs Boxer - Breed Comparison
  37. Jack Russell Terrier vs English Pointer - Breed Comparison
  38. Jack Russell Terrier vs Siberian Husky - Breed Comparison
  39. Jack Russell Terrier vs Doberman Pinscher - Breed Comparison
  40. Jack Russell Terrier vs American Bully - Breed Comparison
  41. Jack Russell Terrier vs Abruzzenhund - Breed Comparison
  42. Jack Russell Terrier vs Affenpinscher - Breed Comparison
  43. Jack Russell Terrier vs Afghan Hound - Breed Comparison
  44. Jack Russell Terrier vs Aidi - Breed Comparison
  45. Jack Russell Terrier vs Airedale Terrier - Breed Comparison
  46. Jack Russell Terrier vs Akbash Dog - Breed Comparison
  47. Jack Russell Terrier vs Akita - Breed Comparison
  48. Jack Russell Terrier vs Africanis - Breed Comparison
  49. Jack Russell Terrier vs Askal - Breed Comparison
  50. Jack Russell Terrier vs Atlas Terrier - Breed Comparison