American Molossus vs American Cocker Spaniel - Breed Comparison

Both American Cocker Spaniel and American Molossus are originated from United States. American Cocker Spaniel may grow 26 cm / 10 inches shorter than American Molossus. American Cocker Spaniel may weigh 34 kg / 74 pounds lesser than American Molossus. Both American Cocker Spaniel and American Molossus has almost same life span. Both American Cocker Spaniel and American Molossus has almost same litter size. Both American Cocker Spaniel and American Molossus requires Moderate Maintenance.

Basic Information

Gun dog
Molosser dogs
United States
United States
Height Male:
38 - 40 cm
14 - 16 inches
56 - 66 cm
22 - 26 inches
Height Female:
34 - 38 cm
13 - 15 inches
51 - 60 cm
20 - 24 inches
Weight Male:
11 - 14 kg
24 - 31 pounds
38 - 48 kg
83 - 106 pounds
Weight Female:
7 - 12 kg
15 - 27 pounds
32 - 43 kg
70 - 95 pounds
Life Span:
12 - 15 Years
10 - 14 Years
Litter Size:
1 - 7
6 - 8
Other Names:
Cocker Spaniel, Cocker
American Molosser • American Brabanter • American Bullenbeisser
Colors Available:
Black, black with tan, merle, buff ASCOB
Colors are black, black brindle with some white
Long, fine, shiney
coat type coarse, dense, smooth and long
Affectionate, Cheerful, Friendly, Gentle, Intelligent, Lively, Loving, Loyal, Outgoing, Playful, Responsive, Stubborn
Alert, Courageous, Independent, Intelligent, Loving, Loyal, Protective, Quiet, Territorial
Moderate Maintenance
Moderate Maintenance
Kids Friendly:
New Owners Friendly:


american cocker spanielDescended from the English Cocker Spaniel when the latter were brought to the United States in the late 1800s. American hunters wanted a smaller dog for bird hunting, so they crossed them with smaller spaniel breeds. The English and the American Cockers were considered the same breed until 1935 when the American Kennel Club officially separated them into 2 distinct breeds. After this the American Cocker’s popularity increased dramatically. To this day they are one of the most popular breeds in the U.S. Recently their popularity has spread back to England. The American Cocker Spaniel has evolved from a hunting dog life to a very popular family pet.

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.


american cocker spaniel puppyThe American Cocker spaniel is a sturdy dog of medium size. The have a rounded head with a broad and deep muzzle. The jaw is even and square while the teeth have a scissors bite. The American Cocker has round eyes that are almost always dark with the exception of the Merle who can have blue colored eyes. They have long ears and a docked tail in the U.S. Docking is illegal in most of Europe. The American Cocker bred for field hunts have shorter coats than those bred for show. Grooming is essential for this longhaired breed. It is especially important for the eyes and ears to be kept clean.

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.

Health Problems

american cocker spaniel dogPerhaps the least of the American Cocker Spaniel’s health concerns are the tendency to overeat and become obese. The more serious concerns include glaucoma, cataracts, dysplasia, allergies, Cherry eye, lip fold pyoderma, liver disease, cardiomyopathy, and congestive heart failure (CHF).


The most serious health issue the breed faces is IMHA or Immune Mediated Hemolytic Anemia which can be deadly. In fact, it is almost always fatal and comes on quickly. With this condition the dog can bleed out internally and there is little that veterinary medicine can do.

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


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.


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.

Caring The Pet

Feeding puppies and adults

american cocker spaniel puppiesThe American Cocker Spaniel breed requires attention to detail and making sure your puppy gets enough and your adult doesn’t get too much. Feed the pups twice a day until they reach the age of 4 months and then cut them back to the adult dose of once a day at supper time. Feed from a cup to a cup and a half.

Health Issues

not previously mentioned include Ectropion and Entropion, Prolapse of the nicititans gland, gastric torsion and elbow dysplasia. Have your puppy tested for eye diseases and any issues with the knee and hip. These are social dogs and will not do well alone outside. They need to live inside.

Exercise and games

The American Cockers love to play and need a lot of exercise. Nice long walks, games of fetch or even agility will keep your Cocker happy. have plenty of stamina and need regular exercise. They also enjoy a good hunt.


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.


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.


Favored Qualities

american cocker spaniel dogsThis is a gentle, happy dog. They are high energy, high spirited, friendly dogs who like people and other animals alike. They are happy to be with you and want to please you. He can find a home in the country and in the city alike. He is inquisitive and easy to train.

Potential Difficulties

But be warned they can be stubborn and hard to housebreak. They can be shy and need a lot of socialization as a pup. They can take over a household if you are not the strong pack leader they need. They have a tendency to urinate when excited and must live inside with the family. They are far too social to be left outside. An unhappy, unstable cocker can be into resource guarding of things, spaces and people. They can bark obsessively or be hyperactive. They must have a loving home with the family.

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.

Comparison with other breeds

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  40. American Molossus vs American Bully - Breed Comparison
  41. American Molossus vs Abruzzenhund - Breed Comparison
  42. American Molossus vs Affenpinscher - Breed Comparison
  43. American Molossus vs Afghan Hound - Breed Comparison
  44. American Molossus vs Aidi - Breed Comparison
  45. American Molossus vs Airedale Terrier - Breed Comparison
  46. American Molossus vs Akbash Dog - Breed Comparison
  47. American Molossus vs Akita - Breed Comparison
  48. American Molossus vs Africanis - Breed Comparison
  49. American Molossus vs Askal - Breed Comparison
  50. American Molossus vs Atlas Terrier - Breed Comparison