Bernedoodle Generations: F1, F1B, Reverse F1B, F2 & Multigen Explained
What is an F1B Bernedoodle? How is it different from an F1 or Multigen? Bernedoodle generation labels describe the breeding structure behind a puppy and the resulting ratio of Bernese Mountain Dog to Poodle genetics. That ratio influences coat type, shedding, allergy suitability, temperament, and the genetic diversity (measured by Coefficient of Inbreeding, or COI) that drives long-term health. This guide explains every generation, the genetics behind coat outcomes, and how Stokeshire uses COI management to deliver the health benefits of hybrid vigor in practice.
Bernedoodle Generation Comparison
Each generation label describes how much Bernese Mountain Dog and Poodle genetics a Bernedoodle carries, and how far removed it is from purebred ancestors. This ratio is the single most important predictor of coat type and shedding behavior, and it also affects the genetic diversity of the cross.
| Generation | Cross | Genetic Ratio | Coat Expectation | Shedding | Allergy Suitability |
|---|---|---|---|---|---|
| F1 | Bernese × Poodle | 50% / 50% | Wavy to slightly curly; variable | Low to moderate | Mild allergies |
| F1B | F1 × Poodle | ~25% Bernese / 75% Poodle | Curlier; more consistent furnishings | Very low to non-shedding | Moderate to severe |
| Reverse F1B | F1 × Bernese | ~75% Bernese / 25% Poodle | Straight to wavy; Bernese-dominant look | Moderate to high | Not suitable for allergies |
| F2 | F1 × F1 | ~50% / 50% (recombined) | Highly variable; unfurnished possible | Variable, RSPO2-dependent | Unpredictable |
| F2B | F2 × Poodle | ~62.5% Poodle / 37.5% Bernese | Wavy to curly; more stable than F2 | Low | Moderate allergies |
| F3 | F2 × F2 | ~50% / 50% (further recombined) | Variable; stabilizing through selection | Low to moderate | Varies by individual |
| Multigen | Multiple generations | Varies, selectively bred | Most consistent wavy or curly | Very low | Most suitable |
Generation labels describe breeding structure. They do not guarantee specific outcomes in any individual puppy. The only way to predict coat type with confidence is genetic testing of both parents (RSPO2, KRT71, MC5R, FGF5) before the pairing. Stokeshire confirms all four loci on every breeding dog.
Hybrid Vigor Is Real. The Mechanism Is COI.
Hybrid vigor (the scientific term is heterosis) is a documented genetic phenomenon, not a marketing claim. It has been characterized in livestock and companion animal genetics for over a century. The mechanism is straightforward: crossing two unrelated lines reduces homozygosity at recessive disease loci. A puppy's two copies of any given gene come from different ancestral populations, which lowers the probability of inheriting two damaging recessive variants at the same locus.
The measurable lever for this benefit is the Coefficient of Inbreeding (COI). Lower COI means more heterozygosity, which means lower expression risk for recessive diseases. Embark and similar panels calculate COI directly from genotype data, which is why every Stokeshire breeding dog is tested and why COI management is part of every pairing decision we make.
What about the 2024 Royal Veterinary College study?
The O'Neill et al. 2024 study at the Royal Veterinary College is often cited as evidence that crossbreed dogs are not healthier than purebreds. The study surveyed 9,402 UK dog owners about 57 of the most common health conditions across three Poodle crosses (Labradoodle, Cavapoo, Cockapoo) and reported that 86.5 percent of comparisons showed no statistically significant difference. That is a real finding, but the study's scope matters.
It was based on owner-reported data, not clinical records. It examined the most common health conditions (otitis, dental tartar, anxiety, allergic skin disease), not the most serious ones. It did not study Bernedoodles, Aussiedoodles, or Australian Mountain Doodles. It did not measure coefficient of inbreeding, lifespan, or fatal recessive disease incidence. And like much VetCompass research, it was supported in part by veterinary insurance partners.
The honest reading is this: across 57 common conditions in three Poodle crosses, owner-reported data did not show a population-level health advantage. That is useful information. It does not disprove hybrid vigor, and it does not say anything about the COI-managed crosses Stokeshire actually produces.
Why this matters for the Bernedoodle you take home
Two things have to be true at once. Hybrid vigor delivers real benefits at the genetic level through reduced homozygosity. And those benefits are only captured when a breeding program actively manages COI, tests both parents for recessive disease alleles, and avoids the well-documented trap of multigenerational programs that drift toward inbreeding within their own line.
That is the difference between a Bernedoodle bred for hybrid vigor on paper and one bred for hybrid vigor in practice. Stokeshire publishes COI ranges for our pairings, tracks lineage diversity across generations, and outcrosses strategically when a line begins to show reduced diversity. Good Dog certification audits this work.
Each Bernedoodle Generation Explained
F1 Bernedoodle
A direct cross between a purebred Bernese Mountain Dog and a purebred Poodle. F1 Bernedoodles carry the lowest Coefficient of Inbreeding of any generation, which means maximum heterozygosity at recessive disease loci. This is the genetic basis of hybrid vigor, and F1 delivers it in its most concentrated form.
Coat outcomes in F1 litters are the most variable. Puppies may range from wavy to slightly curly, with shedding levels from low to moderate. Furnishings depend on whether the Poodle parent carries one or two copies of the RSPO2 gene. Most F1 puppies will be at least heterozygous (Ff) and furnished, but coat curl and shedding intensity vary between siblings in the same litter.
Best suited for: Families prioritizing genetic diversity and the lowest possible COI in their dog, who accept coat variability as the trade-off. Mild allergies only, not recommended for severe allergies.
F1B Bernedoodle
Produced by breeding an F1 Bernedoodle back to a purebred Poodle. The B stands for backcross. This increases the Poodle genetic contribution to approximately 75 percent, which significantly stabilizes the curly, lower-shedding coat trait. F1B litters produce the most consistently furnished, allergy-considerate coats of any first-generation cross.
The higher Poodle percentage means the Bernese temperament influence is somewhat diluted. F1B Bernedoodles may be slightly more energetic and less heavy in their calm-indoors temperament compared to F1s. The Bernese gentleness and people-orientation remain present in well-bred lines.
F1B COI is slightly higher than F1 because the backcross reintroduces Poodle ancestry on both sides of the pedigree, but in well-managed programs it remains well below purebred levels.
Best suited for: Allergy-sensitive households. Families who prioritize coat predictability and low shedding. The most popular generation for families with moderate to severe allergies.
Reverse F1B Bernedoodle
Produced by breeding an F1 Bernedoodle back to a purebred Bernese Mountain Dog. This increases the Bernese contribution to approximately 75 percent, creating a dog that leans heavily toward the Bernese in appearance, temperament, and coat structure.
Reverse F1B Bernedoodles tend to have straighter coats that shed more. They look and feel more like a Bernese than a doodle. Some may retain wavy texture from the Poodle grandparent, but furnished, curly coats are uncommon in this generation. These dogs are not appropriate for allergy-sensitive households.
At Stokeshire, we produce Reverse F1B crosses by breeding multigenerational Bernedoodle or AMD studs back to our Bernese dams. The result is the Ultra Bernedoodle classification (see the Bernedoodle Sizes guide and the Stokeshire Doodle Size Standard): a larger-framed dog with strong Bernese presence and a more traditional coat, with the COI benefit of the outcross compared to a purebred Bernese pairing.
Best suited for: Families who love the Bernese look and temperament and want the COI benefit of an outcross. Not suitable for allergy-sensitive homes.
F2 Bernedoodle
Produced by crossing two F1 Bernedoodles. The overall genetic ratio remains approximately 50/50, but the recombination of genes from two hybrid parents produces the widest variability of any generation. Coat texture, curl, shedding level, and size can vary significantly within a single F2 litter.
The critical concern in F2 litters is the unfurnished trait. If both F1 parents carry only one copy of the RSPO2 furnishings gene (Ff), approximately 25 percent of their offspring may be homozygous recessive (ff). Unfurnished puppies lack the characteristic doodle facial hair and shed more like a purebred Bernese. RSPO2 testing of both parents before any F2 pairing is essential, and it is non-negotiable in the Stokeshire program.
F2 COI can creep up if the two F1 parents share recent common ancestry, which is one reason Stokeshire monitors lineage on both sides before approving an F2 pairing.
Best suited for: Families comfortable with unpredictable outcomes in coat and size. Not recommended for allergy-sensitive households unless both parents are RSPO2-tested as FF (homozygous furnished).
F2B Bernedoodle
Produced by breeding an F2 Bernedoodle back to a Poodle. This reintroduces Poodle coat genetics after the variability of the F2 generation, resulting in more stable wavy-to-curly coats with lower shedding than F2 litters. The Poodle percentage is intermediate between F1 and F1B levels.
F2B Bernedoodles offer a compromise: more coat predictability than F2 crosses while retaining a slightly higher Bernese influence than F1B crosses. Temperament tends to balance well between both parent breeds.
Best suited for: Families wanting more predictable coats than F2 without the full 75 percent Poodle concentration of an F1B. Moderate allergy suitability.
Multigen Bernedoodle
Multigenerational Bernedoodles represent the breed's maturation. These dogs are produced by crossing Bernedoodles with other Bernedoodles (or with Poodles) across three or more generations, with breeders selectively choosing parents that produce consistent coat type, size, temperament, and health outcomes.
In well-managed Multigen programs, coat predictability is the highest of any generation. Breeders who RSPO2-test and select for homozygous furnished (FF) status can produce litters where virtually every puppy carries the furnished, lower-shedding coat. Temperament and size also stabilize as breeders select across generations for the traits families value most.
The trap in Multigen programs is COI drift. Breeders who pair too closely within their own Multigen lines lose the genetic diversity that justified the cross in the first place. Stokeshire monitors COI across generations and outcrosses strategically when a line begins to show reduced diversity. Multigen done well preserves hybrid vigor benefits. Multigen done poorly recreates the inbreeding problems the original cross was designed to address.
Best suited for: Families who prioritize predictability in coat, size, and temperament. Most suitable for allergy-sensitive households. Therapy and service work candidates.
Why Generation Affects Coat: The Genetics
Generation labels are shorthand for genetic ratios. The actual drivers of coat outcomes are the specific genes each parent contributes. Four loci determine whether a Bernedoodle will have a curly low-shedding coat or a straight shedding coat. Understanding these genes explains why two F1 Bernedoodles from different programs can produce dramatically different coats.
Controls facial furnishings (beard, eyebrows, moustache). FF (two copies) = fully furnished. Ff (one copy) = furnished but carries unfurnished. ff = unfurnished, sheds like a Bernese. This is the gene that determines whether a doodle looks like a doodle.
Determines coat curl tightness. Two copies = curly. One copy = wavy. Zero = straight. F1B and Multigen litters typically carry more curl copies from the increased Poodle genetics.
Influences hair growth cycle turnover. Poodles carry the low-shedding variant. Higher Poodle percentage (F1B, Multigen) means a higher probability of inheriting this variant. Shedding is multigenic, so no single gene is a guarantee.
Controls overall coat length. Most furnished Bernedoodles carry the long-coat variant through Poodle lineage. Short-coat variants produce noticeably shorter hair regardless of curl or furnishings.
RSPO2 Inheritance by Generation
The furnishings gene is the most consequential locus for families choosing between generations. Here is how RSPO2 inheritance typically plays out:
| Generation | Typical Poodle Parent RSPO2 | Typical Offspring RSPO2 | Unfurnished Risk |
|---|---|---|---|
| F1 | FF (purebred Poodle) | Ff (one copy, furnished but carrier) | None in this litter, but offspring carry one copy |
| F1B | FF (purebred Poodle) | FF or Ff, high furnishing consistency | Very low. Poodle contributes at least one F copy |
| F2 (Ff × Ff) | N/A. Both parents are F1 | ~25% FF, ~50% Ff, ~25% ff | ~25% of litter may be unfurnished |
| Multigen | Varies, selected for FF | FF or Ff, stabilized through selection | Minimal in tested programs |
| Reverse F1B | N/A. Bernese parent is ff | Ff at best, many will be ff | High. Most lean unfurnished |
This is why F2 litters can produce surprise unfurnished puppies, and why responsible breeders test both parents for RSPO2 before any F2 or Multigen pairing. At Stokeshire, every breeding dog is Embark-tested for coat genetics before inclusion in the program. We do not make pairings without confirmed RSPO2, KRT71, MC5R, and FGF5 status on both parents.
→ Full coat genetics guide: RSPO2, KRT71, and MC5R explained in depth with genotype outcome tables
Which Bernedoodle Generation Is Right for Your Family?
The right generation depends on three factors: your allergy sensitivity, your coat preference, and how much predictability you need in the outcome. COI considerations are best discussed with the breeder for the specific pairing in question, since they vary by individual lineage.
| Your Priority | Best Generation | Why |
|---|---|---|
| Lowest COI, maximum genetic diversity | F1 | Widest genetic distance between parents. Lowest homozygosity at disease loci. Variable coat is the trade-off. |
| Low-shedding coat for allergies | F1B or Multigen | 75% or more Poodle genetics stabilize curly, furnished, low-shedding coat outcomes. |
| Bernese look with COI benefit | Reverse F1B | 75% Bernese appearance and temperament with the outcross COI benefit. Shedding coat. Not for allergies. |
| Most predictable outcomes | Multigen | Multiple generations of selection stabilize coat, size, and temperament when COI is actively managed. |
| Therapy or service work candidate | F1B or Multigen | Consistent temperament and low-shedding coat are the priorities for clinical environments. |
| Budget-conscious | F1 or F2 | Sometimes lower-priced due to coat variability. Excellent dogs. Coat predictability is the trade-off. |
We produce F1, F1B, and Multigen Bernedoodle litters, with primary focus on F1B and Multigen lines for their coat consistency and allergy suitability. Our F1 litters serve families who prioritize the lowest possible COI and are comfortable with coat variability. We produce Reverse F1B crosses selectively for families who want the Ultra Bernedoodle experience: strong Bernese presence with the COI benefit of the outcross. Every pairing is informed by full Embark genetic panels on both parents, including coat genetics (RSPO2, KRT71, MC5R, FGF5) and COI calculation, so we can predict coat outcomes and manage genetic diversity at the same time. Our program meets the standards required for Good Dog certification.
Common Misconceptions About Bernedoodle Generations
"F1B is always better than F1"
Not necessarily. F1B is better for allergy suitability and coat predictability. F1 carries the lowest Coefficient of Inbreeding of any generation and delivers the most concentrated form of hybrid vigor benefit. Neither is universally superior. They serve different families. An F1 Bernedoodle with a wavy coat from health-tested parents may be a stronger health prospect than an F1B from untested parents. Generation is one factor among several.
"Higher generation number means higher quality"
Generation number describes breeding structure, not quality. An F3 Bernedoodle is not inherently better than an F1. It is further from purebred ancestors, which means more opportunities for selective stabilization but also more potential for COI drift if the program is not carefully managed. Quality is determined by health testing, COI management, temperament evaluation, and breeding decisions. Not by generation label.
"Hybrid vigor is a myth"
It is not. Heterosis is a documented genetic phenomenon characterized for over a century in livestock and companion animal genetics. The mechanism is reduced homozygosity at recessive disease loci, which is measurable through COI. The recent VetCompass research from the Royal Veterinary College reported that owner-reported common conditions did not differ significantly between three specific Poodle crosses and their parent breeds. That finding is real and useful, but it does not measure COI, fatal recessive disease incidence, or the Bernedoodle, Aussiedoodle, or AMD crosses. Hybrid vigor delivers benefit when COI is actively managed and parents are tested. It does not deliver benefit on label alone.
"All F1 Bernedoodles are hypoallergenic"
No dog is completely hypoallergenic. F1 Bernedoodles are among the most variable in coat outcomes. Some will produce low-shedding wavy coats, others may shed more substantially. Families with allergies should consider F1B or Multigen lines, or spend time with an adult dog of the same generation before committing. Stokeshire does not guarantee allergy compatibility for any dog regardless of generation.
"Unfurnished Bernedoodles are defective"
Unfurnished Bernedoodles are genetically normal dogs that did not inherit the RSPO2 furnishings gene. They are healthy, well-tempered, and make wonderful companions. They simply have a Bernese-like coat that sheds more than a furnished doodle. The term unfurnished describes a coat genotype, not a flaw. For families who do not have allergy concerns and prefer a more natural appearance with less grooming demand, unfurnished Bernedoodles may actually be a better fit. Stokeshire breeds intentional unfurnished lines and does not market them as defective or discount them.
→ Learn more about unfurnished doodles: what they are, why they exist, and who they fit
Bernedoodle Generation FAQs
What is an F1 Bernedoodle?
What is an F1B Bernedoodle?
What is a Reverse F1B Bernedoodle?
What is a Multigen Bernedoodle?
Which Bernedoodle generation is best for allergies?
Can F2 Bernedoodle litters produce unfurnished puppies?
Does generation affect Bernedoodle temperament?
Does generation guarantee a healthier Bernedoodle?
What does the RSPO2 furnishings gene mean for my Bernedoodle?
What is COI and why does Stokeshire talk about it?