DogBreedCompass

Mastiff (English Mastiff) vs Pomeranian: Which Suits Your Home?

Mastiff (English Mastiff) or Pomeranian? On paper they differ most on apartment suitability, and on the scales Mastiff (English Mastiff) is the heavier at 120–250 lbs. Here is how the two compare on everything that shapes an ordinary week.

mastiff infographic
pomeranian infographic

This is for someone already down to Mastiff (English Mastiff) and Pomeranian and deciding between them. For this pair the decision usually turns on apartment suitability and barking, so those are covered first and in most detail. Anyone choosing from a flat has a clear answer here: Pomeranian rates 5/5 against 2/5. There is no origin story here — only what changes about your week.

Quick verdict

Between Mastiff (English Mastiff) and Pomeranian, apartment suitability is what separates them; neither is the lower-effort dog overall.

Choose mastiff if...

Choose Mastiff (English Mastiff) if you do not want a standing grooming appointment, shedding is a problem in your house and your walking routine is modest.

Choose pomeranian if...

Choose Pomeranian if you are in a flat or a smaller home, this is your first dog and a smaller dog suits your car, your home or your back.

Head-to-head comparison

FeaturemastiffpomeranianWinner
Size classgiantsmallEqual
Weight120–250 lbs3–7 lbsEqual
Height27–32 in8–11 inEqual
Lifespan9–11 years12–16 yearspomeranian
Exercise needLow (2/5)Moderate (3/5)mastiff
Grooming needLow (2/5)High (4/5)mastiff
SheddingModerate (3/5)High (4/5)mastiff
Energy levelLow (2/5)High (4/5)Equal
BarkingVery low (1/5)High (4/5)mastiff
Apartment suitabilityLow (2/5)Very high (5/5)pomeranian
Good for first-time ownersLow (2/5)Moderate (3/5)pomeranian
Tolerates being aloneModerate (3/5)Low (2/5)mastiff
TrainabilityModerate (3/5)Moderate (3/5)Equal
Good with kidsVery high (5/5)Moderate (3/5)mastiff
Good with other dogsModerate (3/5)Moderate (3/5)Equal
Friendly to strangersModerate (3/5)Low (2/5)mastiff
Cost levelVery high (5/5)Moderate (3/5)pomeranian
CoatShort, denseDouble coat, fluffyEqual
OriginEnglandGermany/PolandEqual
Typical monthly cost$150–$350$80–$150Equal
Typical first-year cost$2,200–$4,500$1,200–$2,200Equal

Deep dive

Size and build

At 3-7 lbs, the Pomeranian is roughly the size of a Mastiff's paw, the Mastiff's 120-250 lb range makes this one of the largest size mismatches in this whole batch. Height runs 27-32 inches against just 8-11. Whatever else separates these two breeds, the scale of the size gap alone rules out most direct comparisons of daily handling.

Energy and exercise

The Pomeranian is the more energetic dog day to day, energy level high (4/5) against the Mastiff's low (2/5), though exercise need is closer, moderate (3/5) for the Pomeranian versus the Mastiff's low (2/5). Small breeds often carry more restless energy indoors even when their actual exercise requirement is modest, and that pattern holds here.

Grooming and shedding

The Pomeranian needs considerably more coat care, high (4/5) against the Mastiff's low (2/5), that fluffy double coat needs regular brushing to avoid matting. Shedding tells a similar story: Pomeranian high (4/5), Mastiff moderate (3/5). For a dog this small, the Pomeranian's grooming demands are surprisingly close to what you'd expect from a much bigger breed.

Apartment living, noise and time alone

The Pomeranian barks a lot, high (4/5) against the Mastiff's very low (1/5), a common trait in small alert breeds that can surprise new owners. Apartment suitability favors the Pomeranian clearly, very high (5/5) against the Mastiff's low (2/5), though its higher exercise and grooming needs mean small-space living still takes some effort.

Training and owner experience

Trainability is closer than the size gap might suggest, moderate (3/5) for both breeds, and first-time-owner suitability tells a similar story, moderate (3/5) for the Pomeranian against the Mastiff's low (2/5). Neither breed is a top-tier easy trainer, just for very different reasons: the Mastiff's size demands consistency, the Pomeranian's boldness needs firm, patient handling from the start.

Kids, other dogs and visitors

The Mastiff rates higher with kids, very high (5/5) against the Pomeranian's moderate (3/5), a small, bold dog around young children carries more risk of injury than temperament alone suggests. The Mastiff also edges ahead with strangers, moderate (3/5) against the Pomeranian's low (2/5); both tie at moderate (3/5) for compatibility with other dogs in the household.

Health and lifespan

The Pomeranian lives notably longer, 12-16 years against the Mastiff's 9-11, a gap of up to seven years at the extremes. Hypothyroidism is the one condition shared between both health lists; otherwise the Mastiff's risks lean toward cancer and heart disease while the Pomeranian's include tracheal collapse and hypoglycemia, both more typical of very small breeds.

Cost to keep

The Mastiff costs substantially more, very high (5/5) against the Pomeranian's moderate (3/5), with monthly costs of $150-350 versus $80-150, and first-year costs of $2,200-4,500 against $1,200-2,200. The Pomeranian can cost less than half as much to keep in that first year of ownership.

Mastiff (English Mastiff) vs Pomeranian at a glance

Mastiff (English Mastiff) weighs 120–250 lbs and lives 9–11 years; Pomeranian weighs 3–7 lbs and lives 12–16 years. The two diverge most on apartment suitability, barking and grooming need and 3 other rated axes. They are level on good with other dogs and trainability, so those cannot decide it. Where the table declares a winner it means less work for the owner, nothing more; descriptive rows are left as ties on purpose. The value here is in the differences between the two columns; treat any single score as approximate.

Frequently asked questions

How big is the size difference?

About as extreme as it gets on this site, the Mastiff can weigh up to 250 lbs, the Pomeranian as little as 3 lbs.

Which barks more?

The Pomeranian, rated high (4/5) against the Mastiff's very low (1/5).

Is either a good first dog?

The Pomeranian rates a bit better, moderate (3/5) against the Mastiff's low (2/5), though neither is a top-tier beginner pick.

Which fits an apartment better?

The Pomeranian, very high (5/5) against the Mastiff's low (2/5), though its grooming and barking needs still require some effort in a small space.

What's the cost gap?

Significant, $150-350 monthly and $2,200-4,500 in year one for the Mastiff, against $80-150 and $1,200-2,200 for the Pomeranian.

Do they share health risks?

Hypothyroidism is the one condition on both lists. Otherwise their health concerns diverge sharply, reflecting how different giant-breed and toy-breed medical issues tend to be.

Which lives longer?

The Pomeranian, by a wide margin, 12-16 years against the Mastiff's 9-11.

Quick answers

View more answers
Living

Which to choose overall?

Small space and don't mind barking, Pomeranian; room to spare and want a calm giant good with kids, Mastiff.

Costs

What's the monthly cost?

Mastiff $150-350 versus Pomeranian $80-150, the Mastiff costs well over double.

Behavior

How much exercise does each need?

Pomeranian moderate (3/5), Mastiff low (2/5), a small gap despite the size difference.

Health

Which lives longer?

Pomeranian 12-16 years, Mastiff 9-11 years.

Related DogBreedCompass guides

  • Mastiff (English Mastiff) breed guideReaders comparing the two usually want the full profile of Mastiff (English Mastiff) before deciding.
  • Pomeranian breed guideThe same for Pomeranian, so the comparison can be checked against the detail.
  • Mastiff (English Mastiff) vs Saint BernardSaint Bernard is the closest breed to Mastiff (English Mastiff) on the measured axes, so it is the natural next comparison.
  • Pomeranian vs Yorkshire TerrierYorkshire Terrier sits closest to Pomeranian, which makes it the alternative worth ruling out.
  • Mastiff (English Mastiff) vs Yorkshire TerrierYorkshire Terrier is the other breed Pomeranian is most often weighed against.
  • Pomeranian health problemsThe health pages set out what each breed is actually screened for.

Related guides

Important reminder

Health information here is general and is not veterinary advice. If your dog shows pain, sudden behaviour change, or worsening symptoms, consult a licensed veterinarian.

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