Maltese vs Portuguese Water Dog
A side-by-side comparison to help you find the right breed for your lifestyle.
Maltese
Also known as: Maltese Lion Dog, Melita, Roman Ladies' Dog, Ye Ancient Dogge of Malta
The Maltese is an ancient companion breed with a long, silky white coat. Known for its affectionate, devoted nature and low-shedding coat, this toy breed requires dedicated grooming but rewards owners with unwavering devotion. Originally bred for over 2,000 years solely for companionship, the Maltese thrives on human contact and struggles when left alone.
Extra Small
Medium
12-15+ yrs
21-25 cm
1.8-3.2 kg
Portuguese Water Dog
Also known as: PWD, Portie, Cão de Água Português, Obama Dog
The Portuguese Water Dog (PWD) is a highly energetic and intelligent breed known for its curly, hypoallergenic coat and exceptional swimming abilities. Originally bred to work alongside Portuguese fishermen—herding fish into nets, retrieving lost tackle, and swimming messages between boats—they are devoted 'Velcro dogs' who bond intensely with their families.
Medium
High
11-14 yrs
43-57 cm
16-27 kg
Quick Comparison
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Energy | ||
| Trainability | ||
| Grooming Needs | ||
| Family Friendly | ||
| Independence |
Key Characteristics
| Good with Kids | ||
| Good with Dogs | ||
| Good with Cats | ||
| Hypoallergenic | ||
| Apartment Friendly | ||
| First-Time Owner OK |
| Detail | Maltese | Portuguese Water Dog |
|---|---|---|
| Size | Extra Small | Medium |
| Energy Level | Medium | High |
| Grooming | High | High |
| Trainability | Moderate | Easy |
| Barking Level | High | Medium |
| Shedding Level | Low | Low |
| Chew strength | Light | Moderate |
| Housing | Apartment | Yard |
Owner Fit & Decision Guide
Owner Match
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Experience Level | Beginner (with grooming commitment) | Intermediate |
| First-Time Owner | ||
| Ideal Owner | Retirees, empty nesters, or remote workers who enjoy constant physical contact. Someone who wants a 'baby' rather than just a dog and has time for dedicated grooming. | Active individual or family willing to hire professional groomer. Works from home or can provide midday activity. Has access to swimming opportunities. Tolerant of a shadow dog that demands interaction. |
Maltese Dealbreakers
- Work away from home 8+ hours
- Have toddlers (fragile breed - falling on Maltese can break bones)
- Cannot commit to daily grooming and dental care
- Noise-sensitive living situation
Portuguese Water Dog Dealbreakers
- Sedentary lifestyle - if you hate walking/swimming, this dog becomes neurotic and destructive
- Budget constraints - if $100/month for grooming is a hardship
- Long work hours - if everyone is gone 9-5 without dog walker or daycare
Surrender Risk
| Factor | Maltese | Portuguese Water Dog |
|---|---|---|
| Risk Level | Medium | Medium |
| Primary Reasons | Moving/housing changes, Lack of time for grooming and companionship, Behavioral issues (barking, housebreaking failures) | Grooming & Energy - owners underestimate coat maintenance leading to severe matting, Mouthiness in puppyhood surprises and overwhelms owners, Sheer amount of interaction the dog demands |
Temperament & Personality
Behavior Comparison
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Prey Drive | ||
| Watchdog Ability | ||
| Stranger Friendly | ||
| Drool Level | ||
| Wanderlust |
Vocalization
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Barking Level | High | Medium |
| Howling Tendency | ||
| Whining Tendency | High | High |
| Separation Vocalization |
Safety & Reliability
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Escape Artist | ||
| Dog Park Suitable | ||
| Off-Leash Reliable | ||
| Small Animal Safe | ||
| Leash Reactivity | ||
| Resource Guarding Risk | Moderate | Low |
Maltese Social Traits
Moderate
Often doesn't realize small size - may challenge large dogs (Napoleon Complex)
Portuguese Water Dog Social Traits
Medium
Generally friendly with proper socialization
Training
Maltese
- Use treats and praise exclusively - harsh methods backfire
- Don't laugh when puppy growls at slippers - set boundaries early
- Consistency is key with housebreaking - frequent outings, crate training
Portuguese Water Dog
- Use high-value treats and toys - 'Because it pays well' works better than 'Because I said so'
- Keep sessions varied and engaging - they get bored with repetition
- Channel mouthiness into retrieving games and teaching them to carry objects
Maltese Considerations
Bred for millennia solely for companionship, Maltese often panic when left alone. This manifests as destructive chewing, self-mutilation (licking paws raw), and relentless vocalization. Not suitable for 8-hour workdays without intervention.
Despite their size, Maltese are vigilant watchdogs. They will announce every delivery truck, neighbor, and leaf. In apartments, this high-pitched, persistent barking can lead to noise complaints and eviction notices.
The single most common frustration. Small bladders require frequent outings, and they can be sneaky about indoor accidents. Even adult Maltese may not be 100% reliable outside a crate or pen.
Because they are fragile, owners often tolerate behaviors (growling, snapping, resource guarding) that would be unacceptable in larger dogs. This can create a dog that rules the household.
Portuguese Water Dog Considerations
PWDs were bred to work on small fishing boats alongside their masters all day. They follow you into the bathroom and may develop severe separation anxiety if left alone 8+ hours. Prone to demand barking and whining if ignored.
As a retriever breed, they interact with the world through their mouths. PWD puppies are notoriously 'nippy' and oral—this is not aggression but can be painful and frightening for young children.
This breed is famous for dancing on hind legs and jumping up to greet faces. While charming to some, it's a significant fall risk for elderly owners or small children.
Professional grooming every 6-8 weeks at $100-150 is mandatory, not optional. Neglecting this leads to severe matting that damages skin and requires shave-down.
Multi-Species Compatibility
| Species | Maltese | Portuguese Water Dog |
|---|---|---|
| With Cats | Generally excellent - one of the most cat-compatible breeds | Generally safe if socialized - may chase running animals but usually stop when animal stops |
| Small Mammals | Generally safe with supervision - not a terrier, low prey drive | Caution - may try to chase and retrieve |
| Birds / Reptiles | Use caution - fluttering birds may trigger chase instinct | Not a livestock guardian - may try to herd or play with stock |
Advanced Behavior
| Trait | Maltese | Portuguese Water Dog |
|---|---|---|
| Predatory Sequence Risk | Arrested/None | Arrested |
| Biddability | High | High |
| Noise Sensitivity | Medium | Low |
| Territorial Barking | ||
| Same-Sex Aggression Onset | N/A | N/A |
Maltese: Kill instinct largely bred out - may chase but rarely grab or kill. Cooperative partners who want to please, but also prioritize comfort. Leash reactivity stems from feeling vulnerable at small size.
Portuguese Water Dog: Predatory sequence: Orient -> Eye -> Stalk -> Chase -> Grab-Bite. The Kill-Bite and Dissect phases are inhibited. This makes them generally safe with other dogs and often cats, though they may annoy them.
First Year & Life Stages
First Year Challenges
| Challenge | Maltese | Portuguese Water Dog |
|---|---|---|
| Puppy Difficulty | ||
| Destructive Phase | 4-10 | 6-18 |
| House Training | Hard | Moderate |
| Crate Training | Medium | High |
| Adolescent Regression |
Maltese: Hypoglycemia risk in young puppies - monitor food intake vigilantly. Small bladder makes housebreaking a 4-6 month challenge minimum. Crate training essential but must be introduced gently.
Portuguese Water Dog: PWD puppies are 'land sharks' - their retrieving instinct manifests as severe nipping and mouthing. Combined with high intelligence and energy, they require more management than a Golden Retriever (6/10) but less than a Malinois (9/10).
Life Stages Timeline
| Stage | Maltese | Portuguese Water Dog |
|---|---|---|
| Puppy Phase | 10 months | 12 months |
| Adolescence | 6-10 | 12-36 |
| Adult Years | 1-8 | 3-9 |
| Senior Onset | ~9 years | ~9 years |
| Peak Energy Age | 1-4 years | 1-3 years |
Size & Physical Characteristics
Physical Stats
| Measurement | Maltese | Portuguese Water Dog |
|---|---|---|
| Height | 21-25 cm | 43-57 cm |
| Weight | Not enough data yet | Not enough data yet |
| Size Category | Extra Small | Medium |
| Lifespan | N/A | 11–14 years |
| Litter Size | 2-4 | 4-8 |
Maltese Coat
Portuguese Water Dog Coat
Lineage & Origin
| Detail | Maltese | Portuguese Water Dog |
|---|---|---|
| Original Purpose | Companionship for Roman matrons and royalty | Fishing crew member - herding fish into nets, swimming messages between boats, retrieving broken nets and tackle |
| Origin | Mediterranean (Malta), referenced by Aristotle 384-322 BC | Portugal, coastal regions, centuries-old heritage |
Breeding Details
| Detail | Maltese | Portuguese Water Dog |
|---|---|---|
| C-Section Rate | 20-30% | Low |
| Whelping Difficulty | Medium | Easy |
| Puppy Mortality Rate | Moderate | Low |
Physical Risks
| Risk | Maltese | Portuguese Water Dog |
|---|---|---|
| Bloat / GDV Risk | Low | Low |
| Slippery Floor Risk | Medium | Low |
| Min Fence Height | 0.6m | 1.5m |
| Dig / Escape Risk | Low | Low |
Health & Common Conditions
Maltese Health Issues
Portuguese Water Dog Health Issues
Maltese Suggested Tests
- OFA Patella clearance
- OFA Cardiac clearance
- Serum Bile Acid test (liver shunt screening)
Portuguese Water Dog Suggested Tests
- prcd-PRA DNA test
- EOPRA DNA test
- JDCM DNA test
- GM-1 DNA test
- OFA Hip Evaluations (or PennHIP)
- Annual Eye Exams (CAER)
Health Risk Overview
| Risk Factor | Maltese | Portuguese Water Dog |
|---|---|---|
| Cancer Risk | Low | Low |
| Cardiac Risk | High | Medium |
| Neurological Risk | Medium | Low |
| CCL/ACL Tear Risk | Low | Low |
| Vet Burden Tier | Medium | Medium |
Sensitivities & Allergies
| Sensitivity | Maltese | Portuguese Water Dog |
|---|---|---|
| Skin Allergies | ||
| Environmental Allergies | ||
| Stomach Sensitivity | Medium | Moderate |
| Food Allergies | Chicken, Grains |
Health Maintenance
| Care Item | Maltese | Portuguese Water Dog |
|---|---|---|
| Nail Growth Rate | Normal | Normal |
| Eye Care Needs | High | Medium |
| Anal Gland Issues | Occasional | Rare |
Senior Care & Aging
Maltese Senior Care
Common Senior Issues
- Dental disease escalation
- Heart murmurs (MVD onset)
- Cataracts/vision loss
- Arthritis requiring furniture stairs
Significant dental intervention often needed by age 9+. Heart murmurs common - regular cardiac monitoring essential.
Portuguese Water Dog Senior Care
Common Senior Issues
- Arthritis/joint stiffness
- Cataracts/PRA progression
- Addison's Disease (can appear at any age)
- Hip dysplasia complications
Slow down significantly around 9+. Watch for clouding eyes (cataracts/PRA) and stiffness (arthritis).
Grooming & Care
Maltese
high maintenancePortuguese Water Dog
high maintenanceLifestyle Compatibility
Maltese Daily Life
Portuguese Water Dog Daily Life
Housing & Legal Restrictions
| Restriction | Maltese | Portuguese Water Dog |
|---|---|---|
| BSL Restricted | ||
| Common Rental Ban | ||
| Insurance Blacklist | ||
| Weight Category | Under 25lbs | 25-50lbs |
Climate Tolerance
| Climate | Maltese | Portuguese Water Dog |
|---|---|---|
| Heat Tolerance | ||
| Cold Tolerance | ||
| Water Affinity | Low | Extreme |
Travel Compatibility
| Activity | Maltese | Portuguese Water Dog |
|---|---|---|
| Car Travel | Good | Excellent |
| Camping | ||
| Beach Friendly | ||
| Hiking Rating | ||
| Cabin Flight Eligible | ||
| Hotel Friendly Size |
Niche Suitability
| Role | Maltese | Portuguese Water Dog |
|---|---|---|
| Service Dog | Low | Medium |
| Therapy Dog | High | High |
| Deep Pressure Therapy | ||
| Canicross / Bikejoring | ||
| Apartment Adaptable | ||
| Tactile / Sensory Friendly | ||
| Livestock Guardian | ||
| Medical Alert | Low | Medium |
Costs & Expenses
Upfront Costs
| Cost | Maltese | Portuguese Water Dog |
|---|---|---|
| Purchase Price | $2,000-4,000 | $2,500-4,500 |
| Initial Cost Range | $2,000–$4,000 | $2,500–$4,500 |
| Cost Tier |
Ongoing Costs
| Cost | Maltese | Portuguese Water Dog |
|---|---|---|
| Monthly Range | $100–$180 | $150–$300 |
| Yearly Range | $2,000–$2,500 | $2,500–$3,500 |
| Food / Month | $25-40 | $60-90 |
| Insurance / Month | $40-70 | $50-80 |
| Grooming / Session | $50-100 | $100-150 |
| Vet Routine / Year | $400-800 | $400-1,000 |
| Monthly Cost Tier |
Maltese Lifetime Cost
$25,000-40,000
Portuguese Water Dog Lifetime Cost
$30,000-50,000
Quirks & Fun Facts
Daily Quirks
| Quirk | Maltese | Portuguese Water Dog |
|---|---|---|
| Snoring | ||
| Flatulence | Rare | Rare |
| Slobber Level | None | None |
| Smell When Wet | Mild | None |
| Zoomies Frequency | Weekly | Daily |
| Counter Surfing | ||
| Digging Tendency | None | Low |
Maltese Quirks
Reverse Sneezing
A common, alarming honking gasp sound caused by excitement or allergies. Usually harmless but terrifying for new owners.
Tear Staining
Rusty streaks under eyes caused by porphyrins in tears. Requires constant cosmetic management with daily wiping and filtered water.
Picky Eating
Master manipulators who may refuse food to hold out for something better. Don't give in or you'll create a monster.
Portuguese Water Dog Quirks
Counter Surfing Ninjas
Their intelligence and food motivation make them expert kitchen thieves - they can steal food with impressive stealth
The Portie Greeting
Famous for dancing on hind legs and jumping up to greet faces - can be a fall risk for elderly or children
The Talker
They 'talk' with grumbles, moans, and varied barks as common ways to communicate their needs
Water Obsession
Most will dive into any body of water including mud puddles and swimming pools
Frequently Asked Questions
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