Furry Diary

Limited edition, only one made.

Mixed breed (dog)

Canis familiaris

Also called mutt, mongrel, crossbreed, Heinz 57, bitsa / bitzer (Australia)

CrossbreedDeep profile

From Worldwide; mixed-ancestry dogs are found wherever dogs live12

At a glance the quick version

Lifespan12 years341
Sizevaries

A 2024 UK study of over 584,000 dogs found a median life expectancy of 12.0 years for crossbreeds (12.7 for purebreds, 12.5 for all dogs). Older studies summarised on Wikipedia reported mixed breeds living about 1.2 years longer than purebreds on average. Individual lifespan varies widely with size.

truly unique look and personality
adaptable to many lifestyles and homes
can excel in dog sports such as agility and obedience
1256

Coat and looks how to spot one

any: short, medium, long, wiry, curly, smooth or double coat

Every mixed-breed dog is one of a kind. Body shape, ear set, tail carriage and coat type can come from any of the breeds or types in the dog's family tree, so two mixed-breed dogs rarely look alike. Free-living village and street dogs in many parts of the world tend towards a medium-sized, short-coated, practical build, but household mixes can be anything from tiny and fluffy to large and wiry.12

Coloursany colour or pattern1

Personality what they are like

There is no single mixed-breed temperament: each dog's personality reflects its particular ancestry, upbringing and life experience. Many are adaptable, resourceful and people-friendly, and street dogs in some cities have been noted for learning to handle busy urban life with remarkable ease. Meeting the individual dog, and asking a shelter or rescue about its behaviour, is the best way to know what it will be like.12

Daily activity how busy a day looks

Depends on size, age and ancestry: a mix with working or herding breeds in its background usually wants more exercise and mental work than a small companion-type mix. Mixed breeds can compete in agility, obedience, rally, tracking, Fast CAT and flyball, which are great outlets for energetic dogs.5

Grooming and care the hands-on bits

Set by the coat the dog actually has: short smooth coats need an occasional brush, double coats need regular brushing during shedding, and curly or long coats (for example poodle crosses) need frequent brushing and periodic trimming. Nail trims, ear checks and tooth care apply to every dog.17

Home where they are happiest

Mixed-breed dogs live everywhere, from flats to farms. Match the home to the individual: a larger, active mix needs more space and outdoor time, while a small mix can be content in a smaller home with regular walks.12

Company who they like around

Like all domestic dogs, mixed breeds are social animals that do best with daily company, positive training and chances to meet people and other dogs. Village and street dogs often live alongside people as community dogs, showing how closely dogs are tied to human life.2

The story where it all began

For most of history almost every dog was what we would now call a mixed breed or landrace; closed, pedigree breeds with written standards are a largely 19th-century invention. Free-ranging village and street dogs, which still make up most of the world's dogs, continue this ancient pattern, and some regional types such as the Indian pariah dog are seen as close to early domestic dogs. In pet homes, mixed breeds have long been common, and deliberate crosses between two breeds (often called designer dogs, such as poodle crosses) became fashionable from the late 20th century. Kennel clubs have increasingly welcomed them: The Royal Kennel Club started the Scruffts crossbreed show in 2000, the AKC opened its sports to mixed breeds through Canine Partners in 2009-2010, and Westminster opened its agility championship to them in 2014. DNA breed tests now let owners explore their dog's ancestry, although the AKC does not accept them as proof of breed.12896

Fun facts for the dinner table

  1. 1

    Laika, the first animal to orbit the Earth aboard Sputnik 2 on 3 November 1957, was a small mixed-breed stray found on the streets of Moscow.10

  2. 2

    In 2024 Nimble, a Border Collie and Papillon mix, became the first mixed-breed dog to win the Westminster Masters Agility Championship.6

  3. 3

    Around three quarters of the world's estimated 700-900 million dogs are free-ranging, and most of these are mixed or landrace dogs.2

  4. 4

    Street dogs in Moscow have been reported to ride the metro, and dogs in Bucharest have been seen using pedestrian crossings.2

  5. 5

    Mixed-breed dogs have dozens of local nicknames around the world, from 'Heinz 57' and 'bitzer' to 'potcake' in the Bahamas, 'sato' in Puerto Rico and 'vira-lata' in Brazil.1

  6. 6

    Over 1 million mixed-breed dogs have enrolled in the AKC Canine Partners programme since 2009.5

  7. 7

    The Royal Kennel Club's Scruffts show for crossbreeds has classes such as 'Child's Best Friend' and 'Golden Oldie', and entry money goes to the Kennel Club Charitable Trust.8

Recognised by the official bits

AKC
Not a breed and not eligible for conformation shows, but mixed-breed dogs can enrol in the AKC Canine Partners programme (announced 14 April 2009, enrolment from 1 October 2009, competition from 1 April 2010) and earn titles in agility, obedience, rally, tracking, Fast CAT coursing and the Canine Good Citizen programme. AKC reports over 1 million dogs enrolled since 2009.11
The Royal Kennel Club
Runs Scruffts, a national show for crossbreed dogs started in 2000 and judged on character and temperament rather than a breed standard; since 2013 the final has been held at Crufts in Birmingham.8
Westminster Kennel Club
Mixed-breed dogs have been allowed to enter the Masters Agility Championship since it began in 2014.6

Popularity 42% of dogs in the Dogs Trust 2024 National Dog Survey (UK) were crossbreeds, with nearly 10% being mixes of unknown breeds7

How many Estimated 150 million mixed-breed dogs worldwide (no year given); separately, about 75% of an estimated 700-900 million dogs worldwide are free-ranging12

The care rhythm Furry Diary remembers it for you

A typical home-care rhythm for a Mixed breed (dog). It is our own starting plan, not a vet's advice, and you can change every line in the app.

Tell me when it launches

Owner questions the things everyone asks

How often should I feed my Mixed breed (dog), and at what times?

Feed your adult mixed breed at least two meals a day, ideally at the same times each day. Puppies need three to four smaller meals. Furry Diary's starting plan is to offer meals at consistent times, and always follow the food label and your vet's advice for amounts.13 Furry Diary plan

What should a Mixed breed (dog) eat, and which foods are dangerous?

Feed a complete, balanced dog food appropriate for your dog's size and age. Dangerous foods include chocolate, grapes, raisins, onions, garlic, xylitol, macadamia nuts, and raw dough. Always avoid these and consult your vet for a safe diet plan.1413

How often should I bathe a Mixed breed (dog)?

Furry Diary's starting plan suggests a bath every 8 weeks, but you can bathe more often if your dog gets very dirty or has skin issues. Use a gentle dog shampoo and avoid over-bathing to keep the coat healthy.15 Furry Diary plan

How often does a Mixed breed (dog) need brushing?

Brush your mixed breed at least once a week, but more often if it has a long or curly coat. Furry Diary's starting plan is weekly brushing to remove loose hair and prevent mats. Adjust based on your dog's actual coat type.15 Furry Diary plan

How do I trim a Mixed breed (dog)'s nails, and how often?

Trim nails every 4 weeks, or sooner if you hear clicking on the floor. Use a dog nail clipper and cut a little at a time, stopping before the quick. If unsure, ask a vet or groomer for a demonstration.15 Furry Diary plan

How much exercise does a Mixed breed (dog) need?

Furry Diary's starting plan is about 60 minutes of exercise daily, but this varies by your dog's size, age, and ancestry. Active mixes may need more, while smaller or older dogs may need less. Adjust to your dog's energy level.5 Furry Diary plan

How do I look after a Mixed breed (dog)'s teeth and ears?

Brush your dog's teeth at least twice a week, ideally daily, using dog toothpaste. Check ears weekly for dirt or moisture, especially if floppy, and gently clean with a vet-recommended solution. Never push anything into the ear canal.15 Furry Diary plan

How long does a Mixed breed (dog) live?

Mixed breed dogs typically live around 12 years, though this can vary based on size and health. Smaller dogs often live longer, and good care can help your dog reach a happy old age.134

Is a Mixed breed (dog) good with children and other pets?

Mixed breeds can be wonderful with children and other pets, but it depends on the individual dog's temperament and upbringing. Meeting the dog and asking a shelter about its behavior is the best way to know. Always supervise interactions.12

Can a Mixed breed (dog) be left alone?

Mixed breeds are social animals and do best with daily company. How long they can be left alone varies by the individual dog; some may be fine for a few hours, while others may need more attention. Provide toys and a comfortable space, and consider a pet sitter if you're away long.2

Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Furry Diary's own starting care plan. A friendly guide, not a vet's advice.

You might also like

our little thank-you jar

Like what we are building? Buy Archy a bone.

All of this is free for everyone, with a source on every fact, and it will never show annoying ads. It was a big job to build, so if it helped you, buy Archy a bone. Any amount is lovely, and no is a perfectly fine answer too.

Archy is our Australian Cattle Dog and chief taste tester. Tips go to 4V3D OÜ, the small family studio behind Furry Diary.

Buy Archy a bone

Where this comes from

Every breed page shows where each fact comes from. If we got something wrong, sorry, we are pet people, not a science magazine. Tell us at support@furrydiary.app and we will fix it.

  1. Wikipedia: Mongrel en.wikipedia.orgused for names, definitions, population estimate, lifespan studies, DNA tests
  2. Wikipedia: Free-ranging dog en.wikipedia.orgused for world dog population, village dogs, street dog behaviour
  3. Phys.org: Study finds small, long-nosed dogs live the longest (2024) phys.orgused for crossbreed median lifespan
  4. Liverpool John Moores University: Dog longevity (2024) ljmu.ac.ukused for study size, overall median lifespan
  5. AKC: Does the AKC Accept Mixed-Breed Dogs? akc.orgused for eligible sports, enrolment numbers
  6. NPR: Nimble becomes first mixed-breed dog to win Westminster agility title npr.orgused for recognition, fun fact
  7. Dogs Trust National Dog Survey 2024 dogstrust.org.ukused for UK crossbreed share, common crossbreeds
  8. Wikipedia: Scruffts en.wikipedia.orgused for Royal Kennel Club crossbreed show
  9. AKC press release: AKC Announces New Program for Mixed Breeds (2009) akc.orgused for recognition, history
  10. Wikipedia: Laika en.wikipedia.orgused for fun fact
  11. akc.org akc.org
  12. en.wikipedia.org en.wikipedia.org
  13. VCA Animal Hospitals: Feeding times and frequency for your dog vcahospitals.comused for owner questions
  14. ASPCA: People foods to avoid feeding your pets aspca.orgused for owner questions
  15. ASPCA: Dog grooming tips aspca.orgused for owner questions
  16. ASPCA: Cat grooming tips aspca.orgused for owner questions
  17. RSPCA: What to feed your rabbit rspca.org.ukused for owner questions

Checked 2026-09-30. Text is written in our own words from these sources.