Roan in the
Lagotto Romagnolo

What Roan Actually Is in the Lagotto

Roan in the Lagotto Romagnolo is a coat pattern in which pigmented hairs — most commonly brown — emerge throughout the white areas of a puppy coat as the puppy develops. It is not a colour in itself. It is a process — a developmental programme that transforms a white-or-white-spotted newborn into the mottled adult most people recognise as a Lagotto.

This is worth saying clearly because much of what is written about roan in dogs more generally describes the visual outcome (white hairs intermixed with pigmented hairs in an adult coat) without describing the developmental directionality. In the Lagotto specifically, the puppy starts white. The pigment arrives. By the time the dog is grown, the coat is what we call "roan" — but the lived experience for a buyer is watching colour appear, not seeing a coat as it always was.

Roan is also not the same as greying with age. Senior dogs of many breeds — including Lagottos — develop grey muzzles and flecking as melanin production slows in those areas. That is a separate process, unrelated to the roan gene, on a different timeline. The roan pattern itself is established by adulthood and remains essentially stable through the dog’s life. Senior greying may add a separate layer of change much later, but it is not roan.

And roan is distinct from the merle pattern, which is sometimes confused with it in casual conversation. Merle produces irregular patches of diluted and undiluted colour and is associated with serious health risks — deafness, microphthalmia, blindness — when two copies of the gene are present. The roan pattern carries no such risks. Lagottos are not a merle breed, and any Lagotto described as merle should be regarded with scepticism.

The Genetics Behind the Pattern

Roan in dogs is generally associated with the SP (Spotting) locus, with involvement of the MITF (Microphthalmia-associated Transcription Factor) gene region. The roan allele at this locus affects how melanocytes — the cells responsible for pigment production — populate hair follicles during fetal and early postnatal development.

The mechanism explains the developmental directionality observed in Lagottos: a roan puppy is born before melanocytes have completed their migration into all the relevant follicles. The areas not yet pigmented appear white. As development continues through the first weeks of life, more follicles are populated, and pigmented hairs emerge. The white-to-mottled transformation is the visible expression of an underlying biological process completing itself on schedule.

Most published research on roan in dogs — including foundational work by Schmutz and Berryere (2007) — describes the pattern as it expresses in breeds like the English Cocker Spaniel, Australian Cattle Dog, and Bluetick Coonhound. The Lagotto-specific expression differs visually from these breeds, and our understanding of how roan unfolds in the Lagotto rests substantially on direct breeder observation across many litters rather than on published genetic studies of the Lagotto in particular. The general genetic mechanism (SP locus, MITF involvement) is sound. The specific phenotype — the timing of pigment emergence, the uniformity of distribution, the texture of the resulting adult coat — is something Lagotto breeders observe in their own dogs and which the academic literature has not extensively addressed.

Inheritance follows a dominant or incompletely dominant pattern. A dog with one copy of the roan allele expresses roan. A dog with two copies tends to express somewhat more strongly. A dog with no copies will not express roan regardless of its parentage. The visual difference between one-copy and two-copy roan Lagottos is real but generally subtle — both produce clearly mottled adults rather than dramatically different coats.

What a Roan Puppy Looks Like at Birth

Most roan Lagotto puppies are born appearing white, or more often white with brown or orange spots or patches. The roan pattern is not yet visible at birth. The pigmented hairs that will eventually emerge throughout the white areas are not yet present in the follicles — they have not begun to come through.

This is the source of much confusion for new buyers who visit a litter at three or four days old and try to assess what each puppy will look like as an adult. At birth, the visible differences between puppies are about base colour distribution — which puppies have brown spots, where, how big — not about roan expression, which is invisible at this stage.

There are, however, two reliable early indicators that a puppy carries the roan pattern:

• Paw pad pigmentation. Roan-carrying puppies typically have dark, well-pigmented paw pads from birth. For puppies that appear largely white otherwise, the paw pads are the clearest visible indicator that pigment will follow throughout the coat.
• Nose pigmentation. The same logic applies to the nose. A roan puppy’s nose is typically dark and well-pigmented from the earliest days, even when the coat itself is predominantly white.

An experienced breeder examining a litter at three to seven days can identify which puppies are roan-carriers based on these indicators — though the specific degree to which each will roan is not yet determinable.

The Development Arc, Stage by Stage

The visible development of the roan coat in the Lagotto compresses into the first eight weeks of life, with the most dramatic transformation occurring between approximately two and eight weeks. By the time a puppy goes home with its family at exactly eight weeks, the coat the family is bringing home is largely the coat the family will live with. From there, the changes are gradual and minor.

At birth: white, or white with brown or orange spots

As described above, the puppy at birth shows base colour patterns but no visible roaning. Early indicators of the roan genotype are the paw pads and nose. The coat itself is at this stage indistinguishable from that of a non-roan puppy with the same base coloration.

Around 2 weeks: pigmented hairs begin emerging

This is when roan first becomes visible. Pigmented hairs — most commonly brown — begin emerging through the white areas of the puppy coat. The change is subtle at first but the process is clearly underway by this age, well before the three-week mark. A careful observer comparing photographs from week one and week two can usually see the difference.

Importantly, the pigment emerges uniformly throughout the white areas. It does not start at the feet or muzzle and spread inward, as some sources describing other breeds suggest. In the Lagotto, the entire previously-white coat begins filling in at once, with darker regions sometimes filling in more rapidly but the overall distribution being even.

2 to 8 weeks: the most dramatic phase

This six-week window is the period of most rapid roan development. Pigmented hairs continue emerging throughout the white coat in increasing density. Each week brings visible change. The puppy that was white-with-brown-spots at birth becomes, in stages, a clearly mottled animal — a dog whose coat is unmistakably patterned even to a casual observer.

Buyers visiting a litter at four weeks see a substantially different coat than buyers visiting at two weeks. Buyers visiting at six weeks see again a meaningfully different coat than at four weeks. By the time the puppy is ready to go home at eight weeks, the formerly-white areas have largely filled in.

8 weeks: pickup age, the coat is fully mottled

By the time a puppy goes home with its family at exactly eight weeks, the roan pattern has thoroughly emerged. The coat is a fully mottled blend of dark and light hairs across the body. The colour you see at pickup well represents the colour the dog will be as an adult. Unlike the dramatic week-to-week changes of the previous two months, the change from this point onward is much more gradual.

First haircut at 8 to 12 weeks: a darker dog than expected

The first professional or home haircut, typically between eight and twelve weeks of age, often reveals a substantially darker dog than the surface puppy coat had suggested. This is because the undercoat in roan Lagottos carries more pigment than the lighter tips of the puppy coat. When the longer puppy hair is trimmed, the denser, darker undercoat is exposed.

Many families are surprised by this. The puppy that came home appearing softly mottled emerges from the first groomer’s table looking distinctly more pigmented. This is normal. The coat that grows in afterward will reflect the dog’s true adult coloration.

9 months: the puppy-to-adult coat transition

At approximately nine months, the puppy coat begins its full transition to the adult coat. This is the next major coat event after the first eight weeks — but it is primarily a texture transition, not a colour transition. The adult coat is denser, curlier, and has the rustic woolly character that defines the breed. We have written extensively about this transition in our companion essay on the Lagotto coat.

During this transition, owners may notice subtle continued shifts in roan expression as the adult coat grows in, but the dramatic transformations of the first eight weeks are not repeated.

6 to 18 months: stability

Through this twelve-month window, the roan expression is largely stable. Subtle continued development is normal but dramatic shifts are not. The dog you have at six months is substantially the dog you will have at eighteen months in terms of coat coloration. The visible changes happening during this period are texture-driven (the puppy-to-adult coat transition at nine months) rather than colour-driven.

Year 2 and beyond: the settled adult coat

By age two, the adult coat is settled. Dogs with one copy of the roan gene typically express somewhat more lightly than dogs with two copies, but in both cases the coat is clearly mottled brown-and-white (or orange-and-white). The differences between mildly-expressed and strongly-expressed roan Lagottos are real but generally subtle — you would have to compare two adults side by side to see them clearly.

From age two onward, the coat is largely stable for the rest of the dog’s adult life. The coat does not significantly fade or lighten. Some senior dogs may develop normal age-related greying around the muzzle, but the roan pattern itself does not meaningfully change.

Watch the Coat Develop — Interactive

The most useful way to understand roan development is to see it. Drag the slider to move through the developmental stages of a roan Lagotto Romagnolo, from birth to maturity.

Photographs of an actual roan Lagotto across the development arc will replace the placeholders here. The slider data is accurate to our observations across more than a decade of litters.

Base Colour and Roan

The dominant roan expression in the Lagotto Romagnolo is the brown roan — a white puppy coat that fills in with brown pigmented hairs through the first eight weeks of life. Orange roans, while accepted in the breed standard, are less common. Brown roan is what most prospective Lagotto buyers are actually seeing when they encounter "roan Lagotto" puppies and adults.

The Lagotto Romagnolo breed standard recognises several base colours: off-white, white with brown or orange patches, brown roan, orange roan, and brown. When the roan pattern is present, the white areas of the puppy coat fill in with the corresponding base colour as the dog develops.

A brown roan Lagotto begins life as a white puppy — or a white puppy with brown spots — and by adulthood has filled in with chocolate-toned brown hairs throughout the formerly-white areas. The result is a dog that reads as predominantly brown-and-white, with the specific density of pigmentation varying based on whether the dog carries one or two copies of the roan gene.

An orange roan Lagotto follows the same developmental arc but with apricot or amber-toned pigment instead of brown. The result is a warmer, lighter-toned mottled coat. Orange roans are less common in the breed than brown roans.

The key insight for buyers is that the degree of roaning is variable even within a single litter, even from the same pairing. Two puppies with the same base colour and the same parents can develop somewhat differently as roans — though both will produce clearly mottled adults. Working with a breeder who has produced multiple litters from the same pairing — or who has produced enough litters from related dogs to know the typical range — gives you a realistic picture of what to expect.

Roan vs. Ticked

Roan and ticking are both coat patterns involving pigmented hairs and white hairs together, but they are distinct in their appearance and how they are regarded in the breed standard.

In a ticked coat, small distinct spots or flecks of colour appear on a white background. The white areas remain predominantly white, punctuated by small coloured spots. Think of a Dalmatian’s spots, but smaller and more numerous. Ticking appears on areas that would otherwise remain white throughout the dog’s life — the white background does not fill in.

In a roan coat, the previously-white areas progressively fill in with pigmented hairs as the puppy develops. The result is uniform intermingling of dark and light hairs — a blended, mottled appearance — rather than distinct spots on white. The pigment density is roughly even throughout the affected areas.

Both patterns are influenced by the SP locus, but they express differently and have different developmental trajectories. A ticked Lagotto and a roan Lagotto are not the same thing, and the distinction matters both for breed standard compliance and for setting buyer expectations about coat development. In the Lagotto, true roan — the uniform fill-in — is far more commonly seen than ticking.

How Matching Works at Northwest Lagotto

At Northwest Lagotto, families do not choose puppies. Each puppy is matched to a family by us, based solely on temperament fit. This is one of the most important things for prospective buyers to understand about how our programme operates.

When a litter is born, our job over the next eight weeks is to learn each puppy as an individual — their temperament, their drive, their sensitivity, their curiosity, their tolerance for handling and novelty, their place in the social hierarchy of the litter. By the time a puppy is matched to a family, we know that puppy as a developing personality.

Our role is then to pair each puppy with the family whose household, lifestyle, experience, and expectations best fit that puppy’s emerging temperament. The match is made on fit. Color is not a factor.

This means that families who would only be happy with a specific roan expression — who would be disappointed if their matched puppy had a different colour expression than expected — should consider whether the breed itself, with its inherently variable and developmentally dynamic coat, is the right fit. We want our families to fall in love with the dog they have, not with the dog they imagined.

Our companion essays on how to choose a Lagotto breeder and what makes a great breeder describe this matching philosophy in greater depth.

The Adult Coat: From Year Two Forward

By age two, a roan Lagotto’s coat has settled into its adult expression and stays largely the same for the rest of the dog’s adult life. Unlike some other coat types in other breeds, the Lagotto roan coat is not a dramatically evolving thing through adulthood. The transformation happens in puppyhood. From there it is steady.

The visible difference between a roan Lagotto with one copy of the roan gene and one with two copies is real but generally subtle. Both produce clearly mottled brown-and-white (or orange-and-white) animals. To call one "lightly roaned" and the other "heavily roaned" is more accurate than to call one almost-white and the other almost-brown. Both have turned brown to a meaningful degree by adulthood. They have not turned white.

Senior dogs — typically from age eight or nine onward — may develop normal age-related greying around the muzzle and eyes. This is the same greying that affects all dogs as they age and is unrelated to the roan pattern itself. The roan pattern across the body remains the same.

For owners, this is a reassurance worth holding onto: the dog you bring home at eight weeks, after the colour has come in, is essentially the dog you will have for the rest of your life together. The dramatic transformation you witnessed in puppyhood is not something that continues happening. It happens, and then the dog is the dog.

Roan in Our Programme

We have worked with roan Lagottos for more than eleven years across many litters. In that time we have watched the development arc more times than we can count — and it still produces moments that make us stop and look. The transformation from white-spotted newborn to clearly mottled eight-week-old, compressed into a span shorter than a baseball season, is one of the most genuinely remarkable visual processes in dog breeding.

We have also documented this development on video. If you would like to see the visual arc in motion — coat development filmed from puppyhood through adulthood — our YouTube channel has video content that shows this more vividly than any single photograph or written description can. It is consistently one of our most-watched pieces of content, for reasons that become obvious when you watch the colour come in.

What we tell every family considering a roan puppy is this: take photographs at pickup, and take photographs every three months through the first year, then occasionally thereafter. Not because you are tracking whether you got what you expected — the match is what it is — but because the development is worth recording. Families who do this almost universally tell us later that watching the colour arrive was one of the unexpectedly enjoyable parts of the first weeks at home.

If you have questions about the roan genetics of an upcoming litter, or want to see photographs of previous offspring at various ages, please reach out before applying. We are happy to discuss what to expect. Understanding the breed and its developmental arc before the puppy comes home makes the next fifteen years better for everyone — especially the dog.

Common Questions About Roan in Lagottos