10 Best Dog Breeds Medium Size for Families and Active Owners
Discover the best dog breeds medium size for your lifestyle.
What Qualifies as a Medium-Size Dog Breed?
When dog owners search for "dog breeds medium size," they're usually looking for dogs that fit comfortably in a variety of living situations — not too large for an apartment, not too small for hiking trails. For this guide, we define medium-size breeds as those falling between 20 and 70 pounds (9–32 kg) at maturity, with a shoulder height of roughly 14 to 22 inches (36–56 cm).
- Weight range: 20–70 lb (9–32 kg) adult weight per AKC breed standards
- Temperament: Breeds rated suitable for family life by major kennel clubs and veterinary behaviorists
- Health data: Breeds with documented health screening protocols from the Orthopedic Foundation for Animals (OFA) or breed-specific health foundations
- Accessibility: Breeds available through reputable breeders or rescue organizations in the US
- Versatility: Each breed included must suit at least two common owner lifestyles (e.g., apartment + active, family + low-shedding)
We evaluated 45 breeds in the medium-size category and narrowed to 10 based on veterinary health data, temperament consistency, and real-world owner satisfaction. Below, breeds are grouped by lifestyle fit rather than ranked numerically — because the "best" breed depends entirely on your situation.
Top 10 Medium-Size Dog Breeds: Detailed Profiles
Group 1: Best for Active Households
1. Border Collie
Size Class: Medium (30–55 lb / 14–25 kg; 18–22 in / 46–56 cm)
Key Trait: Highest-ranked breed for canine intelligence and working drive
The Border Collie's ability to learn complex commands in under 5 repetitions makes them unmatched for owners who want a true activity partner. They require a minimum of 90 minutes of structured physical and mental exercise daily — this is not a breed for casual walks. Herding instinct means they may try to "herd" small children, so early redirection training with positive reinforcement is essential.
2. Australian Shepherd
Size Class: Medium (40–65 lb / 18–29 kg; 18–23 in / 46–58 cm)
Key Trait: Versatile working dog with strong family bonding and high trainability
Aussies combine the Border Collie's intelligence with a slightly more adaptable home temperament. They excel in agility, flyball, and nose work. The double coat sheds heavily during seasonal blows (spring and fall) and requires brushing 3–4 times per week. Merle-patterned Aussies should be health-screened for the MDR1 gene mutation, which affects drug sensitivity — a simple cheek swab test costs around $85 through Washington State University's veterinary pharmacogenetics lab.
3. Brittany
Size Class: Medium (30–40 lb / 14–18 kg; 17–20 in / 43–51 cm)
Key Trait: Compact sporting dog with exceptional endurance and softer temperament than most pointing breeds
Often overlooked in favor of larger retrievers, the Brittany packs serious athletic ability into a manageable frame. They're natural swimmers, capable hikers, and notably less mouthy than many sporting breeds. Their exercise need is 60–90 minutes daily. Health screening should include OFA hip evaluations and genetic testing for canine epilepsy, which has a documented prevalence in the breed.
Group 2: Best for Families with Children
4. Cocker Spaniel
Size Class: Small-to-Medium (20–30 lb / 9–14 kg; 13–15 in / 33–38 cm)
Key Trait: Gentle disposition with children, compact enough for smaller homes
The American Cocker Spaniel sits at the smaller end of our medium range but earns its place through exceptional family compatibility. They're among the most biddable breeds — meaning they willingly follow human direction — which makes training straightforward. The trade-off is grooming: their coat requires professional grooming every 6–8 weeks ($50–$80 per session) and daily brushing to prevent matting. Ear infections are the breed's most common health issue due to their long, pendulous ears trapping moisture; weekly ear cleaning with a veterinarian-approved solution is non-negotiable.
5. English Springer Spaniel
Size Class: Medium (40–50 lb / 18–23 kg; 19–20 in / 48–51 cm)
Key Trait: Even-tempered sporting breed with strong retrieving instinct and patience with kids
Springers are the "Goldilocks" of spaniels — larger and sturdier than Cockers, less intense than field-bred pointers. They thrive in households where someone is home most of the day, as they're prone to separation anxiety when left alone for more than 6–8 hours. Their exercise requirement is 60–75 minutes daily. Ask breeders about PFK deficiency screening (phosphofructokinase), a genetic condition affecting red blood cell metabolism that occurs in approximately 5–10% of the breed.
6. Soft Coated Wheaten Terrier
Size Class: Medium (35–45 lb / 16–20 kg; 17–19 in / 43–48 cm)
Key Trait: Low-shedding coat with playful, less intense terrier temperament
Wheatens are often called the "gentleman" of terriers — they have the playfulness of the terrier group without the sharpness or excessive barking. Their single coat sheds minimally, making them a reasonable option for mild allergy sufferers (though no breed is truly hypoallergenic). Puppy coats are dark and lighten significantly by age 2–3. They need 45–60 minutes of exercise daily and respond well to food-motivated positive reinforcement training.
Group 3: Best for Lower-Maintenance Lifestyles
7. Whippet
Size Class: Medium (25–40 lb / 11–18 kg; 18–22 in / 46–56 cm)
Key Trait: Sprint-athlete outdoors, couch companion indoors — minimal grooming needs
The Whippet is the quintessential "dual-mode" dog: explosive speed over short distances (they can reach 35 mph / 56 km/h) followed by hours of calm lounging at home. Their short, single coat requires virtually no grooming beyond occasional wiping with a damp cloth. However, their thin coat and low body fat mean they need a coat in temperatures below 45°F (7°C) and should never be left outdoors in cold weather. Whippets are sensitive to anesthesia — always ensure your veterinarian is experienced with sighthound-specific protocols, which use reduced barbiturate doses.
8. Basset Hound
Size Class: Medium (40–65 lb / 18–29 kg; 11–15 in / 28–38 cm)
Key Trait: Low energy requirements with strong scent-driven enrichment needs
Bassets are medium-heavy despite their short stature — their dense bone structure puts them firmly in the 40–65 lb range. They need only 30–45 minutes of walking daily, making them ideal for less active owners or those with mobility limitations. The trade-off: scent work enrichment is essential. A bored Basset will howl, dig, or follow scents into dangerous situations. Nose work games and snuffle mats provide critical mental stimulation. IVDD (intervertebral disc disease) risk is elevated due to their long spine — avoid allowing them to jump on and off furniture; use ramps instead.
Group 4: Best All-Around Versatile Breeds
9. Miniature American Shepherd
Size Class: Small-to-Medium (20–40 lb / 9–18 kg; 13–18 in / 33–46 cm)
Key Trait: Australian Shepherd temperament and intelligence in a more apartment-friendly package
Recognized by the AKC in 2015, the Miniature American Shepherd (formerly Miniature Australian Shepherd) delivers the Aussie's trainability and loyalty in a smaller frame. They're increasingly popular in urban settings where a full-size Aussie would be cramped. Exercise needs are 60–75 minutes daily, and they excel in dog sports like agility and disc. The same MDR1 drug sensitivity screening recommended for Aussies applies here. Puppy prices from health-tested breeders typically range from $1,800–$3,500.
10. Portuguese Water Dog
Size Class: Medium (35–60 lb / 16–27 kg; 17–23 in / 43–58 cm)
Key Trait: Athletic water breed with low-shedding curly coat and strong handler focus
Made famous by the Obama family's dogs Bo and Sunny, the Portuguese Water Dog is a working breed that thrives with a job. They're natural swimmers with webbed feet and a waterproof curly coat. Exercise needs are 60–90 minutes daily, ideally including water access. Grooming requires professional clipping every 6–8 weeks in a "lion clip" or "retriever clip." Health screening should include OFA evaluations for hip dysplasia and genetic testing for GM1 storage disease and juvenile dilated cardiomyopathy — both documented in the breed.
Breed Comparison Table: All 10 at a Glance
| Breed | Weight (lb/kg) | Exercise (min/day) | Grooming Level | Shedding | Best For |
|---|---|---|---|---|---|
| Border Collie | 30–55 / 14–25 | 90+ | Moderate | High | Sport/working owners |
| Australian Shepherd | 40–65 / 18–29 | 75–90 | High | Very High | Active families |
| Brittany | 30–40 / 14–18 | 60–90 | Low | Moderate | Outdoor enthusiasts |
| Cocker Spaniel | 20–30 / 9–14 | 45–60 | Very High | Moderate | Families, smaller homes |
| English Springer Spaniel | 40–50 / 18–23 | 60–75 | Moderate-High | Moderate | Families, home-based owners |
| Soft Coated Wheaten Terrier | 35–45 / 16–20 | 45–60 | High | Very Low | Families, mild allergies |
| Whippet | 25–40 / 11–18 | 30–60 | Minimal | Very Low | Apartment dwellers |
| Basset Hound | 40–65 / 18–29 | 30–45 | Low-Moderate | Moderate | Less active owners |
| Miniature American Shepherd | 20–40 / 9–18 | 60–75 | Moderate | Moderate-High | Urban active owners |
| Portuguese Water Dog | 35–60 / 16–27 | 60–90 | High | Very Low | Water lovers, active families |
How to Choose: Decision Framework for the Top 3
If you've narrowed it down but can't decide between your favorites, use this decision flowchart to find your best match:
Start Here: What does your typical weekday look like?
- I work from home or am home most of the day.
- → Do you want a dog that will hike/run with you? Yes → Australian Shepherd (needs your presence + activity)
- → Do you prefer relaxed walks and home time? Yes → Basset Hound (content with your company and low-key pace)
- I'm away from home 6+ hours daily.
- → Is your living space an apartment or condo? Yes → Whippet (quiet, low-space, self-entertaining indoors)
- → Do you have a yard? Yes → Portuguese Water Dog (more independent than herding breeds, but still needs evening engagement)
- I have children under 10 in the home.
- → Is grooming budget a concern (under $100/month)? Yes → English Springer Spaniel (manageable at-home grooming)
- → Is low allergen exposure a priority? Yes → Soft Coated Wheaten Terrier (minimal shedding)
- I want a dog sport partner (agility, flyball, herding).
- → Do you have 90+ minutes daily for training and exercise? Yes → Border Collie
- → Do you have 60–75 minutes? Yes → Miniature American Shepherd
Honorable Mentions and Breeds to Approach with Caution
Honorable Mentions
These breeds narrowly missed our top 10 but are excellent medium-size options for specific owners:
- Keeshond (35–45 lb): Outstanding family companion with a fluffy double coat, but heavy seasonal shedding and a tendency to bark at strangers make them less versatile than our top picks.
- Boykin Spaniel (25–40 lb): America's smallest flushing spaniel, excellent for hunting families, but limited breeder availability outside the Southeast US.
- Nova Scotia Duck Tolling Retriever (35–50 lb): The smallest retriever breed, brilliant for active owners, but their high prey drive and vocal nature require experienced handling.
- Standard Schnauzer (30–50 lb): Loyal, low-shedding, and protective, but their strong guarding instinct requires dedicated socialization work during the critical 3–14 week puppy window.
Breeds to Approach with Caution (For First-Time Medium-Dog Owners)
These medium-size breeds are wonderful in experienced hands but present challenges that first-time owners should understand before committing:
- Shiba Inu (17–23 lb): Independent, cat-like temperament with strong prey drive and recall challenges. Off-leash reliability is extremely difficult to achieve.
- Chow Chow (45–70 lb): Intensely loyal to one person but aloof with strangers and children. Requires experienced socialization and may not be suitable for multi-pet households.
- Shar-Pei (45–60 lb): Unique health profile including skin fold infections, entropion, and familial Shar-Pei fever. Veterinary costs tend to be higher than average.
Annual Cost Expectations for Medium-Size Breeds
Medium-size dogs sit in a cost sweet spot — they eat less than large breeds but aren't as fragile as toy breeds. Here's a realistic annual budget breakdown based on 2025–2026 US averages:
| Expense Category | Low-End Estimate | Average | High-End Estimate |
|---|---|---|---|
| Food (quality kibble or balanced diet) | $360/year | $600/year | $1,200/year |
| Routine veterinary care | $350/year | $600/year | $900/year |
| Grooming (breed-dependent) | $0 (home) | $480/year | $960/year |
| Pet insurance | $360/year | $600/year | $960/year |
| Preventive medications (heartworm, flea/tick) | $200/year | $350/year | $500/year |
| Total Annual Cost | $1,270 | $2,630 | $4,520 |
Purchase price from a responsible breeder performing OFA health testing, genetic screening, and early socialization typically ranges from $1,500 to $3,500 for most breeds on this list. Portuguese Water Dogs and Miniature American Shepherds tend to be at the higher end. Adoption through breed-specific rescues typically costs $300–$600 and often includes spay/neuter, initial vaccinations, and microchipping.
Frequently Asked Questions
What is the best medium-size dog breed for a first-time owner?
The English Springer Spaniel and Whippet are our top recommendations for first-time owners seeking a medium-size breed. Springers are biddable and forgiving of training mistakes, while Whippets are low-maintenance in grooming and exercise structure. Both breeds respond well to positive reinforcement training and don't require the intensive mental stimulation that herding breeds demand.
Are medium-size dogs better for apartments than large breeds?
Not necessarily — it depends more on energy level and barking tendency than raw size. A 25-pound Whippet is an excellent apartment dog because they're quiet and sleep 14–16 hours daily. A 45-pound Australian Shepherd in the same apartment would likely develop behavioral problems from insufficient stimulation. Focus on exercise needs and noise level rather than weight alone.
Which medium-size breeds are the healthiest?
Based on OFA health database data, the Whippet, Brittany, and Portuguese Water Dog have the lowest rates of hip dysplasia among our listed breeds. However, every breed carries genetic risks. The single most impactful health decision is choosing a breeder who performs breed-specific health testing — not just a general vet check — before breeding. Ask for OFA or PennHIP certification numbers, which can be verified publicly on the OFA website.
Do medium-size dogs live longer than large breeds?
Yes, on average. According to data compiled by the American Veterinary Medical Association, medium-size breeds (20–70 lb) have a median lifespan of 11–13 years, compared to 8–10 years for giant breeds. Within our list, Whippets and Portuguese Water Dogs tend toward the longer end (12–15 years), while Basset Hounds and Cocker Spaniels average 10–14 years.
Should I get a medium-size puppy or adopt an adult dog?
Both paths have merits. Puppies (8–12 weeks) allow you to shape socialization during the critical developmental window, which closes around 14–16 weeks. Adult dogs (2–5 years) from rescue organizations often have known temperaments, established house training, and completed spay/neuter. For busy households or first-time owners, a 2–4 year old adult dog from a breed-specific rescue can be an excellent match — you skip the puppy chewing and potty training phases while still getting many years together.
How do I verify a breeder is responsible?
A responsible breeder of any medium-size breed should provide: (1) OFA or PennHIP hip evaluation results for both parents, (2) breed-specific genetic test results (e.g., MDR1 for herding breeds, PFK for Springer Spaniels), (3) a written health guarantee of at least 2 years, (4) a take-back clause requiring you to return the dog to them if you can no longer keep it, and (5) references from previous puppy buyers. They should also ask you detailed questions about your lifestyle and be willing to decline a sale if the match isn't right. Red flags include having multiple litters available simultaneously, refusing to let you see the breeding facility, and pricing significantly below breed average.
This guide is for informational purposes. Always consult your veterinarian before making decisions about your dog's health, diet, or exercise program. For breed-specific health concerns, the Merck Veterinary Manual is an excellent reference to discuss with your vet.
Robin Maitland
All our authors care for dogs every day — read more of their work on the authors page.
