American Mastiff is originated from United States but Flat-Coated Retriever is originated from United Kingdom. American Mastiff may grow 30 cm / 12 inches higher than Flat-Coated Retriever. American Mastiff may weigh 54 kg / 120 pounds more than Flat-Coated Retriever. Both American Mastiff and Flat-Coated Retriever has almost same life span. American Mastiff may have less litter size than Flat-Coated Retriever. American Mastiff requires Low Maintenance. But Flat-Coated Retriever requires Moderate Maintenance
The history of the American Mastiff is entirely tied to the old European Mastiffs but in particular the English Mastiff. The developers of the American Mastiff crossed the English Mastiff with the Anatolian Mastiff at the Ohio kennel, Flying W Farms. The founder of this breed is Fredricka Wagner. Because of this the English Mastiff and the American Mastiff look very much alike. The difference between the two is that the American Mastiff was bred to have less health concerns than the English Mastiff and without the drooling. In 2000 the CKC acknowledged that the American Mastiff and the English Mastiff were separate breeds.
The Flat-Coated Retriever traces its heritage to 19th century England. A popular gamekeepers’ dog, the actual descendants of the breed are not entirely known. Like so many well-established breeds, there are many lines of thought about the breed line. There is an unverified line of ancestry that includes the St. Johns Water Dog – an extinct breed from North America. Another story has Canadian sailors bringing their Newfoundlands to England and mixing them with Colliers and Setters. This story has more truth to it and it took 20 years to establish the final breed type.
The breed was originally a retriever with two purposes – to retrieve the hunters’ bounty on land and on water.
The Flat-Coated Retriever was then introduced to the United States as a gun dog. By 1873 it was a “stable type” and in 1915 the AKC recognized the breed. After this, their popularity grew quickly until the American public fell in love with the Golden Retriever and the Labrador Retriever. Then the Flat-Coated Retriever’s numbers and popularity fell. The irony was that both the Golden and the Labrador credited the Flat-Coated Retriever as an ancestor. The survival of the breed was questionable following World War Two. They were brought back by a specific breeding program in the 1960’s.
Breeders in the ‘60s made sure they bred for both show dogs and companion animals. The Flat-Coated Retriever survived and is less popular than other retrievers, but he has his fans. The breed is more popular in the United Kingdom than it is in the United States in part because of Best in Show wins at Crufts
This crossing of the English Mastiff and the Anatolian Mastiff resulted in a Mastiff with a much drier, less drooling mouth than the other Mastiffs. This is a giant, massive dog – powerful and muscular. With a wide head that is rectangular rather than square. Their eyes are dark amber, and their ears are high on their head and rounded. With a medium size muzzle, black mask and heavy head, the American Mastiff is a handsome dog.
Their chest is broad, deep with ribs that extended backward. He has strong legs that are parallel and wide set. He also has a long tail. Puppies of the American Mastiff are born almost black and as they grow their coat color lightens. In addition, it is important that they have a wrinkled forehead as well and a scissors bite is preferred.
The Flat-Coated Retriever has a straight and strong topline with unique head, strong jaws, a long muzzle and small ears. His eyes are dark brown almonds with a friendly and intelligent expression. He has an arched neck and a moderately long tail. The Flat-Coated Retriever is more of an athlete, lighter and certainly more elegant than any other type or breed of retriever.
A love of children and devotion to his pack (family) is bred into the American Mastiff. He is non-aggressive unless you threaten his family or his children. Then he becomes courageous, protective and defensive. This is a gentle giant most of the time, however due to size and the need for strong leadership, the American Mastiff should be socialized and trained early. If they are socialized and trained they will be calm, gentle dogs. They will remain protective and alert, but they will be friendly with strangers. They love to please their people and being highly intelligent they learn fast.
The Flat-Coated Retriever is great with children. Just be careful they don’t knock over small children in their enthusiasm.
They are confident great family dogs. They are “thinking dogs” and need something to work for or they will work for themselves. They can be clowns.
They are adaptable although their size might preclude small locations without yards.
Smart, thinking all the time, they are very trainable. However, they are considered the “Peter Pan” of dogs – they never grow up.
American Mastiffs seem to have fewer health issues than other larger giant breed dogs. However, they can experience allergies as many large, wrinkled dogs do. They also might have a tendency toward eye issues, hip dysplasia, cancer and heart disease. Bloat might be the most life-threatening issue many American Mastiffs experience.
Flat-Coated Retrievers have their share of health concerns from dysplasia to cancer. The breeds problems include:
Hemangiosarcoma, Osteosarcoma, Malignant Histiocytosis, and Fibrosarcoma. Studies show that about half of all Flat-Coated Retrievers die of cancer.
Giant breeds like the American Mastiff are known for growing rapidly as a puppy and therefore proper feeding and nutrition is essential. The slower your American Mastiff grows, the better. Make sure your puppies get enough phosphorous and calcium in their high calorie diet. Free feeding is not recommended. Feed puppies up to 4 small meals per day and feed adults twice a day.
As previously mentioned this breed is a fairly healthy one, There, are however, certain evaluations you should do with your American Mastiff puppy to be sure she is in good health. These tests would include an elbow and hip evaluation to check for dysplasia. He should have an ophthalmologist and cardiologist examine him as well. Most American Mastiffs will not have any problems, but these evaluations will help to prepare you if they do. The wrinkles in your dogs; face, around the eyes and muzzle must be kept clean as they can become infected if you don’t.
Unlike the way he looks, the American Mastiff is not a couch potato, but neither are they a high energy, exercise machine. They do well living in apartments or homes, with or without a fenced in yard. They need a long walk every day. They need mental stimulation through exercise and games. Make sure they learn to love to play so that they don’t become lazy as they age.
He will be a medium size dog. Feed puppies 3-4 times a day about a 1/8 cup of high-quality food. Feed a puppy food designed for medium size dogs or specifically for retrievers.
Feed 2 times a day about !/2 cups of dry food per meal. Do not overfeed. They have a tendency to be obese.
Maintain a healthy weight and avoid exercise before and after meals. The good news is dysplasia and epilepsy are rare in the breed.
They are very energetic and need good exercise. Long walks and a yard to run in. Remember they are hunting dogs and will chase to retrieve things so don’t let them off leash outside your yard. They will excel at agility, tracking. Rally, obedience, swimming, hunting, and jogging. They make great therapy dogs.