Types of Rottweilers: German, American, Serbian & the Roman Myth
There is one Rottweiler breed. German, American, Serbian, and Roman are not sub-breeds — they describe where a dog was bred, which standard it follows, and in one case, a marketing label. Here is what each actually means.
You have seen breeders advertise German, American, Serbian, Roman, and "giant" Rottweilers as if they were different animals. They are not. There is exactly one Rottweiler breed, recognized by the AKC, by Germany's parent club the ADRK, and by the FCI. Every dog sold under any of those labels is registered, when it is registered at all, as the same breed: a Rottweiler.
So what are the "types"? They are regional breeding styles and lineage labels — and one outright marketing invention. "German" and "American" describe which written standard a breeder follows and how strict the gatekeeping is. "Serbian" describes working-import lineage from the Balkans. "Roman," "giant," and "XXL" describe a dog bred above the standard for size, dressed up as a premium. None of them is a separate breed, and none changes the dog's genetics into something new.
This page settles which is which without hedging. We are a Dallas program built on the correct European standard and verifiable health testing, so we have no reason to keep a fake taxonomy alive to protect a keyword. We will tell you what each label means, point you to the dedicated page for each, and then show you the one thing that actually predicts a sound dog — which is not the regional name on the ad.
The Labels vs. The Reality
There are several different breeds or sub-breeds of Rottweiler.
There is one Rottweiler breed. The AKC, Germany’s ADRK, and the FCI each recognize a single Rottweiler — the AKC entered it in its stud book in 1931. "German," "American," "Serbian," and "Roman" describe region, lineage, or marketing — not genetics or a separate breed.
German Rottweilers are a bigger, different breed than American Rottweilers.
Same breed, and the size ranges overlap almost entirely. The AKC sets males at 24–27 in; the FCI/ADRK standard sets males at 61–68 cm (about 24–27 in). The real differences are breeding-standard strictness, mandatory temperament and health testing, and tail (natural vs docked) — not size or genetics.
A "Roman" or "giant" Rottweiler is the largest and most authentic type.
No registry recognizes a "Roman" Rottweiler. It is a marketing label for a dog bred above the standard, sometimes by outcrossing to mastiffs, which means it may not be purebred. The AKC standard treats oversize as a fault, and deliberate oversizing raises the risk of hip and elbow dysplasia and bone cancer.
A red, blue, or rare-colored Rottweiler is a premium type worth more money.
The only standard coat is one black base with rust-to-mahogany markings. "Any base color other than black" is an AKC disqualification. Red comes from a pigment fault, blue is a dilution linked to coat and skin problems, and albinism carries serious health risk. These are disqualifications and red flags, not premium types.
A Serbian Rottweiler is a distinct, superior bloodline.
Serbian Rottweilers are purebred Rottweilers of Balkan-bred lineage — the same breed, all of which traces back to German roots. Quality varies by kennel, and some chase size over soundness. Verifiable pedigree and health testing tell you far more than the word "Serbian."
Is the Rottweiler one breed or several?
One breed. The AKC, Germany's ADRK, and the FCI each recognize exactly one Rottweiler, and the AKC has done so since entering the breed in its stud book in 1931. There is no "German," "American," "Serbian," or "Roman" sub-breed in any registry's nomenclature.
What those words actually describe is breeding context. "German" and "American" tell you which written standard a breeder follows — the FCI/ADRK standard or the AKC standard — and how strict the breeding rules are. "Serbian" tells you a dog comes from Balkan working-import lineage. "Roman," "giant," and "XXL" are marketing labels for oversized dogs. Each standard differs in small ways, like tail docking and exact size ranges, but every one of them describes the same breed. If a breeder talks about "types" as if they were separate breeds, that is your first signal to read the pedigree and the health testing rather than the headline.
At a glance: how the breeding styles compare
German / ADRK
Bred to FCI Standard 147, the master standard. Males 61–68 cm at the withers (about 24–27 in), ideal 65–66 cm; females 56–63 cm. Tail kept natural (docking is banned in Germany). Mandatory breed-suitability and temperament evaluation plus hip and elbow screening before a dog is approved to breed.
American / AKC
Bred to the AKC standard. Males 24–27 in, females 22–25 in, with the mid-range preferred. Tail historically docked (the AKC standard still permits it). No mandatory working or temperament test to breed — looser gatekeeping, same breed.
Serbian
Working-import lineage from Balkan kennels, prized for heavy bone and head type. Same breed, not a sub-breed; bred to FCI/ADRK-derived standards, but kennel quality varies, so pedigree and testing matter more than the label.
Roman / giant / XXL
Not a recognized type. Bred above the standard for raw size, sometimes through mastiff outcrosses. Oversize is a fault, not a feature, and the size pitch comes with elevated orthopedic and cancer risk.
The throughline: the meaningful difference between the legitimate labels is breeding-standard strictness and verifiable testing — not whether the dog is somehow a different animal.
German / ADRK Rottweiler: the correct-standard dog
When people say "German Rottweiler," they mean a dog bred to the FCI/ADRK standard — Standard 147, the master standard from which national standards derive. It sets males at 61–68 cm at the withers (about 24–27 in) with 65–66 cm graded as ideal, females at 56–63 cm, and reference weights of roughly 50 kg for males and 42 kg for females.
The reason German lines tend to look and behave more uniformly is the gatekeeping behind them, not different genetics. The ADRK requires a breed-suitability and temperament evaluation along with hip and elbow screening before a dog is approved to breed. The tail is kept natural, because docking has been banned in Germany under animal-protection law since around 1998–2001. This is a breeding-program difference, not a separate breed. If you want the full picture of correct German breeding in Texas, that is on our German Rottweiler puppies page.
American / AKC Rottweiler: same breed, different gatekeeping
An "American" Rottweiler is one bred to the AKC standard, which sets males at 24–27 in and females at 22–25 in, with the mid-range of each preferred — a range that overlaps almost entirely with the German numbers. The AKC standard describes the temperament you would expect: a calm, confident, courageous dog with a self-assured aloofness that does not lend itself to immediate and indiscriminate friendships.
The differences from German lines are about gatekeeping, not the dog. The AKC does not require a working or temperament test to breed, and its standard still permits a docked tail. That looser structure means American litters vary more from breeder to breeder, which puts even more weight on each individual breeder's health testing and pedigree. It is the same breed; what changes is how tightly the breeding is policed. Our take on the American side of the breed is on our American Rottweiler breeders page.
Serbian Rottweiler: working-import lineage, done honestly
Serbian Rottweilers are purebred Rottweilers from Balkan-bred lineage, not a separate breed — and like all Rottweiler lines, they ultimately trace back to German roots. Serbian working-import lines are often bred for size, heavy bone, and a strong head type, which is why they have a following among people who want an imposing dog.
The honest caveat is that quality varies by kennel. Some Balkan programs breed sound, correct, well-tested dogs; others chase size and head at the expense of structure and health. The word "Serbian" on its own tells you nothing about which one you are looking at. What tells you is the pedigree you can actually read and the health clearances behind the parents. We treat it the same way we treat every line — by the paperwork, not the passport stamp — on our Serbian Rottweiler bloodlines page.
"Roman" / giant / XXL: the marketing myth, not a type
The "Roman Rottweiler" — also sold as "gladiator," "colossal," "king," "giant," or "XXL" — is not a recognized breed or variety. It is a marketing label for a deliberately oversized Rottweiler, and dogs sold this way are often produced by outcrossing to giant breeds like mastiffs, which means they may not be purebred at all. The name leans on the breed's ancient Roman drover-dog ancestry, but that origin belongs to every Rottweiler; the registries never standardized a giant "Roman" form.
Treat this one as a buyer-protection issue, not a type. The AKC standard lists oversize as a fault, and deliberate oversizing compounds a risk profile that is already steep. Per OFA registry data (voluntary submissions), Rottweilers screen dysplastic for hips around 20% of the time and for elbows around 37% — the elbow rate among the highest of any breed — and bone cancer is a leading cause of death, with one large UK study (VetCompass, 2023) putting the breed's osteosarcoma odds at roughly 26.7× that of crossbred dogs. A few cosmetic pounds is not worth that trade. Our full breakdown of where the label comes from and what it costs is on our Roman Rottweiler page.
"Rare" colors and tailed vs docked: what they really tell you
The only correct coat is one black base with rust-to-mahogany markings. The AKC standard puts it plainly — "always black with rust to mahogany markings" — and lists "any base color other than black" as a disqualification. So "rare" colors are not premium types. Red comes from a pigment fault, often tied to inbreeding. Blue is a dilution gene linked to coat and skin problems. True albinism is rare and carries serious health concerns. None should command a higher price; several are red flags for off-standard or outcrossed breeding. A long coat is a disqualification too, not a "long-haired type."
Tail docking is the other tell people misread. A natural tail versus a docked one mostly reflects AKC-US practice versus ADRK/FCI practice — not a genetic type. Docking is banned in Germany and restricted across much of Europe and many other countries, and the current FCI/ADRK standard calls for the tail in natural condition. The AKC standard still permits docking. So "undocked" usually just means the dog was bred under a homeland standard that outlaws the cosmetic surgery — one more reason it is a breeding-style difference, not a breed difference. The full color and coat rules live on our breeding standard page.
What actually matters when you choose
The regional label is the least important thing about a Rottweiler. What predicts a sound dog is verifiable health testing on the parents, structure and temperament that match the correct standard, and a pedigree anchored to the FCI/ADRK lineage you can actually read.
The health screen that responsible Rottweiler breeders run is specific and checkable: OFA or PennHIP hips, OFA elbows, a cardiac exam for subaortic stenosis, an eye exam, and the JLPP DNA test. That last one matters, and almost no "giant" or "rare color" seller will mention it — JLPP is a fatal, autosomal-recessive neurological disease caused by a mutation in the RAB3GAP1 gene, with affected puppies typically showing signs around three months and usually euthanized within the first year, often by six months. A DNA test exists, so a serious breeder tests the parents and never pairs two carriers.
That is the whole point of this page. Do not shop for a "type." Shop for the clearances. A correct, health-tested dog already has the blocky head, the heavy bone, and the confident presence people are really chasing when they search "giant" — without the joint failure and shortened life that oversizing buys. We breed two to three litters a year to the correct European standard in Dallas, Texas, and show the paperwork instead of leaning on a label. See available puppies.
Types of Rottweilers: Common Questions
Are there different breeds of Rottweiler, or is it one breed?+
It is one breed. The AKC, Germany’s ADRK, and the FCI each recognize a single Rottweiler, and the AKC has since 1931. "German," "American," "Serbian," and "Roman" are not sub-breeds — they describe where a dog was bred, which standard it follows, or, in the case of "Roman," a marketing label.
What is the difference between a German and an American Rottweiler?+
They are the same breed with nearly identical size ranges — AKC males 24–27 in, FCI/ADRK males 61–68 cm (about 24–27 in). The real differences are breeding-standard strictness, mandatory temperament and health testing under the German ADRK, and the tail: natural in Germany, where docking is banned, and historically docked under the AKC standard, which still permits it.
Is a Roman Rottweiler a real breed?+
No. No registry recognizes a "Roman" Rottweiler. It is a marketing label for an oversized dog, sometimes produced by outcrossing to mastiffs, which means it may not be purebred. The AKC standard treats oversize as a fault, and deliberate oversizing raises the risk of hip and elbow dysplasia and bone cancer.
What is a Serbian Rottweiler, and is it purebred?+
A Serbian Rottweiler is a purebred Rottweiler of Balkan-bred lineage, not a separate breed — like all Rottweiler lines, it traces back to German roots. Serbian working-import lines are often bred for size and bone, but quality varies by kennel, so verifiable pedigree and health testing tell you more than the "Serbian" label.
Which type of Rottweiler is the biggest, and is bigger better?+
There is no recognized "biggest type" — "Roman," "giant," "gladiator," and "XXL" are all marketing names for the same above-standard dog. Bigger is not better: oversize is a fault, and it compounds the breed’s already-high rates of hip dysplasia (around 20%), elbow dysplasia (around 37% per OFA), and bone cancer. A correct dog is moderate and athletic, not a giant.
Why do some Rottweilers have tails and others don't?+
It mostly reflects which standard the breeder followed, not a genetic type. The FCI/ADRK standard calls for a natural tail, because docking is banned in Germany and restricted across much of Europe and many other countries. The AKC standard still permits a docked tail. So a docked-versus-natural tail is a breeding-style difference, not a breed difference.
Is a red or blue Rottweiler rare or more valuable?+
No. The only standard coat is one black base with rust-to-mahogany markings, and "any base color other than black" is an AKC disqualification. Red comes from a pigment fault, blue is a dilution gene linked to coat and skin problems, and albinism carries serious health risk. These are disqualifications and red flags, not premium types, and should not command a higher price.
Which type of Rottweiler is the healthiest, and what should a breeder test for?+
Health follows the breeder’s testing, not the regional label. A responsible breeder runs OFA or PennHIP hips, OFA elbows, a cardiac exam for subaortic stenosis, an eye exam, and the JLPP DNA test — a fatal genetic disease that a DNA test can screen out. The healthiest dog is the one with verifiable clearances and a readable pedigree, regardless of whether it is called German, American, or Serbian.
You came for a great Rottweiler, not a label.
Bred to the correct European standard in Dallas, Texas — with hips, elbows, cardiac, eyes, and JLPP testing, and the paperwork to prove it.