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Every profile covers the good and the bad. Health risks, common complaints, rescue/return reasons — not just the highlights.
Health statistics from OFA, breed club surveys, and published veterinary studies. Every claim has a source.
Purebreds, designer mixes, and common mixes. Not every dog has a breed standard — but every dog has owners who need good information.
Health data, breeding tips, and honest guidance for 109 breeds.
Elegant ancient sighthound with moderate to large litters and hip, eye, and thyroid screening for responsible breeding.
Largest terrier breed with moderate litters and hip, cardiac, and renal screening priorities for breeders.
Powerful Japanese guardian breed with moderate litters and hip, eye, and thyroid evaluations for responsible breeding.
Powerful northern sled breed with moderate to large litters and hip, eye, and polyneuropathy screening priorities.
Athletic working bulldog with large litters and NCL, hip, elbow, and cardiac screening for responsible breeding.
Bright spitz breed with moderate litters and hip, eye, patella, and PRA screening for responsible breeding programs.
Athletic medium breed with moderate to large litters and important cardiac, hip, and temperament screening.
Ancient livestock guardian with moderate to large litters and hip, elbow, and entropion screening for responsible breeding.
Australian Shepherd-Poodle cross with moderate litters and MDR1, hip, and eye testing from both parent lines.
Tough herding breed with moderate litters and important PRA, deafness, and hip screening for breeding programs.
Popular herding breed with moderate to large litters and critical MDR1, HSF4, and hip screening for responsible breeding.
Ancient breed with a single annual heat cycle, small litters, and Fanconi syndrome as a critical health screening priority.
Low-set scent hound with moderate to large litters and thrombopathia, hip, and eye screening needs for breeders.
Popular scent hound with moderate litters and MLS, hip, eye, and cardiac evaluations for responsible breeding.
Elite working breed with large litters and hip, elbow, and eye evaluations alongside temperament assessment for breeding.
Versatile herding breed with large litters and hip, elbow, eye, and thyroid evaluations as breeding clearance standards.
Bernese Mountain Dog-Poodle cross with moderate to large litters and full health testing from both parent breeds.
Beloved draft breed with moderate litters and significant cancer concerns that make longevity tracking especially important.
Small companion breed with moderate litter sizes and breed-specific concerns including patella luxation and bladder stones.
Giant scent hound with large litters and hip, elbow, cardiac, and bloat awareness as breeding program priorities.
Premier herding breed with moderate litters and CEA, TNS, and hip screening as breeding program essentials.

Compact brachycephalic breed where pregnancy progression, delivery planning, and early puppy growth benefit from consistent monitoring and record-keeping.
Energetic brachycephalic working breed with moderate litters and critical cardiac screening including AS/SAS and ARVC.
Athletic pointing breed with moderate litters and hip, thyroid, and eye evaluations as standard breeding clearances.
Small brachycephalic breed with very small litters and a high C-section rate due to puppy head size.
Distinctive medium breed with moderate litters and critical screening for kidney disease, heart conditions, and deafness.
Powerful guardian breed with moderate litters and hip, elbow, cardiac, and eye screenings as breeding priorities.
Hardy small terrier with moderate litters and breed-specific concerns including GCL and liver shunts.

Most-Googled breed in the US with rising popularity. DCM cardiac screening and temperament evaluation are critical for this guardian breed.
Older of the two corgi breeds with moderate litters and PRA and DM DNA testing alongside standard hip clearances.
Beloved companion breed with significant cardiac concerns — MVD screening is essential before any breeding decision.
Cavalier-Poodle cross with small to moderate litters and critical MVD cardiac screening from the Cavalier side.
Powerful sporting breed with large litters and breed-specific DM, EIC, and PRA testing alongside standard hip and elbow clearances.

One of the smallest dog breeds, Chihuahuas require careful attention during pregnancy, delivery, and early puppy growth.
Unique toy breed with hairless and powderpuff varieties, small litters, and specific genetic considerations for breeders.
Ancient Chinese breed with moderate litters and hip, elbow, eye, and thyroid evaluations for breeding decisions.
Cocker Spaniel-Poodle cross with moderate litters and important PRA, hip, and eye testing from both parent lines.
Popular sporting breed with moderate litters and breed-specific eye, ear, and hip concerns for responsible breeders.
Spotted coach dog with large litters and critical BAER hearing testing alongside hip and urinary screening needs.
Athletic working breed with moderate to large litters and DCM cardiac screening as the breed-defining health priority.
Powerful Argentine hunting breed with large litters and critical deafness BAER testing alongside hip and cardiac screening.
Brachycephalic breed with the highest C-section rate of any breed — over 80% of litters are delivered surgically.
Athletic sporting breed with moderate litters and important health testing for PRA, FN, and hip evaluation.
Massive guardian breed with moderate litters and critical hip, elbow, cardiac, and eye evaluations for breeding decisions.
Elegant sporting breed with moderate litters and breed-specific deafness screening alongside standard hip and elbow clearances.
Versatile sporting breed with moderate litters and important PFK, PRA, and hip screening for responsible breeding programs.
Exuberant sporting breed with large litters and elevated cancer risk that makes longevity tracking especially important.

Brachycephalic breed with narrow safety margins during pregnancy and early growth.

Top working breed with a complex health profile. Hip dysplasia screening and DM DNA testing are essential for responsible breeding programs.
Versatile large sporting breed with large litters and hip, elbow, eye, and cardiac evaluations as breeding priorities.
Rugged versatile sporting breed with moderate to large litters and hip, elbow, eye, and cardiac screening requirements.
Powerful working breed with moderate litters and hip, eye, thyroid, and coagulation factor testing needs for breeders.

America's most popular family breed with large litters and thorough OFA health testing requirements including hips, elbows, cardiac, and eyes.
Popular Golden Retriever-Poodle cross with variable litters — both parent breeds need full health testing before breeding.
Scotland's sporting setter with moderate litters and important hip, elbow, eye, and thyroid evaluations for breeders.
Gentle giant with large litters and breed-specific DCM cardiac screening, hip evaluation, and bloat awareness for breeders.
Livestock guardian breed with moderate to large litters and hip, patella, and neurological condition screening needs.
Large Swiss working breed with moderate litters and hip, elbow, eye, and splenic health monitoring needs for breeders.
Fastest dog breed with moderate to large litters and unique physiology including naturally elevated creatinine levels.
Cuba's national breed with small litters and a growing gene pool that benefits from careful health testing and diversity tracking.
Elegant large sporting breed with large litters and breed-specific PRA-rcd1 DNA testing alongside standard clearances.
Tallest dog breed with moderate to large litters and critical cardiac, liver shunt, and bone cancer screening needs.
Fragile toy sighthound with small litters and puppies that need careful temperature management and weight monitoring.
Energetic small terrier with moderate litters and breed-specific lens luxation and patella screening needs.
Delicate toy breed with small litters and puppies that require attentive monitoring through the first critical weeks.
Fluffy spitz breed with moderate litters and hip, eye, patella, and primary hyperparathyroidism screening needs.
Labrador-Poodle cross with moderate to large litters and full health testing requirements from both parent breeds.

Largest active breeder population in the US with field and show type differences. Requires EIC and CNM DNA testing alongside standard clearances.
Massive draft breed with moderate litters and critical LPN (Leonberger Polyneuropathy) DNA testing for breeding decisions.
Ancient Tibetan breed with moderate litter sizes and breed-specific eye and kidney health concerns for breeders.

Very small toy breed where pregnancy, delivery, and early puppy growth benefit from close monitoring and careful record-keeping.

Small breed with variable litter sizes and frequent singleton pregnancies, where pregnancy progression and newborn weight trends benefit from careful tracking.
Versatile small breed with moderate litter sizes and breed-specific health testing for eyes, hips, and genetic conditions.
Popular small breed with moderate litters and breed-specific concerns including eye conditions and pancreatitis predisposition.
Gentle giant water dog with moderate to large litters and cystinuria, cardiac, and hip screening priorities.
Medium sporting breed with moderate litters and a small gene pool requiring careful diversity management and CDDY/CDPA screening.
Large herding breed with moderate litters and hip, eye, thyroid, and cardiac screening needs for responsible breeding.
Delicate toy breed with very small puppies where precise gram-level weight tracking is essential from birth.
Brachycephalic toy breed with frequent C-sections and very small puppies that need careful weight tracking.
Popular dwarf herding breed with moderate litters and DM, vWD, and hip screening requirements for responsible breeding.
North Carolina's state dog with moderate to large litters and hip evaluation as the primary breeding clearance.

Toy spitz breed where small body size and limited energy reserves make consistent pregnancy and newborn weight tracking especially important.
Athletic water breed with moderate litters and GM1, JDCM, and PRA DNA testing alongside hip and eye clearances.

Brachycephalic breed with compact body structure and reduced tolerance for heat and respiratory strain during pregnancy and early growth.
Versatile American breed with variable size and litter ranges, requiring hip and patella evaluation before breeding.
Athletic hound with moderate to large litters and dermoid sinus, hip, elbow, and thyroid screening requirements.
Powerful working breed with large litters and critical hip, elbow, cardiac, and eye evaluations for responsible breeding.
Iconic herding breed with large litters and CEA, PRA, MDR1, and DM screening as breeding program priorities.
Giant rescue breed with moderate to large litters and hip, elbow, cardiac, and eye evaluations as breeding essentials.
Fluffy northern breed with moderate litters and hip, eye, and cardiac evaluations alongside RD/OSD DNA testing.
Independent small terrier with moderate litters and elevated risk for bladder cancer and von Willebrand disease.
Wrinkled Chinese breed with moderate litters and Shar-Pei fever, hip, elbow, eye, and patella screening priorities.
Small herding breed with moderate litters and MDR1, CEA, and hip screening priorities for responsible breeders.
Japan's most popular companion breed with small litters and breed-specific patella and allergy concerns.

Small brachycephalic breed where pregnancy, delivery, and early puppy growth benefit from careful monitoring and accurate record-keeping.
Athletic northern breed with moderate litters and hip and eye evaluations as the core breeding clearance requirements.
Medium terrier breed with critical PLN and PLE screening — protein-losing conditions define breeding decisions.
Muscular medium breed with moderate litters and breed-specific L-2-HGA and HC DNA testing requirements.
Low-set breed with moderate litter sizes and IVDD as the defining health concern for breeding decisions.

Foundation breed for most doodle crosses with unique health concerns including vWD, Neonatal Encephalopathy, and Sebaceous Adenitis.
Versatile medium breed with moderate litters and hip, eye, and DCM cardiac evaluations for breeding decisions.
Primitive guardian breed with a single annual heat cycle, moderate litters, and hip and thyroid screening priorities.
Tiny, intelligent breed with very small litters and puppies that need precise weight monitoring from birth.
Athletic American hound with moderate to large litters and hip and eye evaluations as core breeding clearances.
Lean, athletic sporting breed with moderate to large litters and breed-specific hip, eye, and thyroid screening needs.
Large sporting breed with moderate litters and important hip, elbow, eye, and thyroid evaluations before breeding.
Hardy small terrier with moderate litters and breed-specific skin conditions and Legg-Calve-Perthes concerns.
Medium sighthound with moderate litters and eye and cardiac evaluations alongside BFJE Myostatin testing.

Toy breed with very small puppies and limited reserves, where subtle changes in pregnancy and early growth trends matter quickly.
Free tools that pair with these breed guides.
Track daily puppy weights and view a side-by-side litter growth chart.
Estimate your due window from the date of breeding.
Find the optimal breeding window using progesterone timing.
Log heat cycles and estimate the next breeding window.
Estimate appropriate stud fees based on breeding factors.
Small and brachycephalic breeds often have narrower birth canals relative to puppy size, smaller energy reserves, and less room for error during labor and the newborn period. Close monitoring, accurate weight records, and an established vet relationship are especially important for these breeds.
Most experienced breeders weigh puppies 2–3 times per day for the first two weeks. This makes it easy to spot a puppy that isn't gaining — or is actively losing weight — which is the earliest warning sign of a fading pup.
Not always, but many brachycephalic breeds (French Bulldogs, Pugs, Boston Terriers, Shih Tzus) have a higher rate of C-sections due to head and shoulder size relative to the dam's birth canal. Your vet can advise based on the individual dog's anatomy and prior whelping history.
The Animal Weight Tracker is the core tool — it tracks multiple puppies in a litter simultaneously, shows a comparison growth chart, and lets you log notes. The Whelping Date Calculator and Gestation Calculator help you plan ahead. All tools are free and completely private — data stays in your browser.
Yes — while the specific concerns differ, all breeds benefit from consistent weight tracking, health testing, and careful pregnancy monitoring. Large breeds have unique challenges like extended growth timelines, bloat risk, and breed-specific genetic conditions.