What to Think About Before Getting an American Mastiff Puppy

Thinking about bringing home an American Mastiff? Let me tell you — they’re incredible dogs, but they’re not for everyone. These gentle giants can be affectionate, loyal, and protective, but they come with some very real challenges that you need to be ready for. I've spent enough time around large breeds to know that it's not just about the cuteness or the cuddles — it's about understanding their needs and being honest about what you can handle.

Here’s what you really need to know before adding an American Mastiff to your family:

1. They’re Big. And I Mean Really Big.

Males can top 200 pounds and stand over 30 inches tall. That’s not just “large dog” big — that’s “need-a-bigger-couch” big. Think about things like: Will they fit in your car? Can you help them up stairs if they get sick? Do you have space for a dog that can clear your coffee table with one tail swipe?

They’re sweet, but they’re not always aware of their size. They can accidentally knock over small kids or elderly family members just by walking by.

2. They’re Indoor Dogs at Heart

Despite their size, Mastiffs are homebodies. They want to be near their people — not banished to the backyard. Leave them alone for too long and you’ll come back to drool-covered walls or a shredded cushion (been there... not fun).

They need time with you, not just space.

3. Drool Happens

Let’s get this out of the way: American Mastiffs drool. A lot. Especially when they drink water, get excited, or shake their heads (which they do often). Keep towels handy. If you’re someone who can’t stand sticky strings of drool on your pants or furniture, this might not be the breed for you.

4. Exercise: Not Too Much, Not Too Little

They’re not high-energy dogs, but that doesn’t mean they’re lazy. Adult Mastiffs need a couple of short walks each day — 20 to 30 minutes is usually perfect. Puppies, though, are a different story.

You actually don’t want to over-exercise a Mastiff pup. Their joints are still forming, and too much running or jumping can cause long-term damage. Slow and steady wins the race here.

5. Socialization and Training Are Non-Negotiable

Because of their size and protective instincts, early socialization is a must. You want your Mastiff to be calm and confident around new people, kids, and other pets. Start young, keep it positive, and expose them to different environments.

Obedience training isn’t just helpful — it’s necessary. You don’t want a 150+ pound dog who ignores your commands. They’re smart and eager to please, but they’ll test you if you’re not consistent.

6. Not Ideal for First-Time Dog Owners

They’re sensitive and strong-willed. If you’re new to dogs or uncomfortable setting boundaries, a Mastiff may overwhelm you. They respond best to calm, confident leadership — not harsh discipline.

7. They’re Surprisingly Gentle with Kids — But Supervision Is Key

Mastiffs tend to be great with older children. They’re patient, protective, and often form strong bonds with the little ones in the house. But because of their size, young kids should never be left alone with them. Accidents can happen, even with the sweetest dog.

Also, no riding the dog like a pony. Ever.

8. Health Matters

Like all giant breeds, American Mastiffs come with some health risks. Common concerns include:

• Hip dysplasia
• Bloat (gastric torsion) — potentially life-threatening
• Progressive Retinal Atrophy (PRA) — can lead to blindness
• Joint issues and arthritis

Stick with a responsible breeder who tests their dogs, and be ready for regular vet checkups. If you notice your Mastiff tiring easily, limping, or showing signs of discomfort, don’t wait — get them checked.

9. They’re Messy Eaters and Drinkers

Expect water puddles around the bowl and kibble scattered everywhere. They’re not dainty. And they drool in their food and water, so bowls need to be cleaned daily (trust me on this — it builds up fast).

Split their meals into two servings a day to help prevent bloat. Avoid intense activity right before or after feeding.

10. Grooming Is Pretty Simple — But Still Important

They’ve got a short coat that sheds moderately. A weekly brushing with a rubber glove keeps the hair down, and during shedding seasons, daily brushing helps a lot. Clean their ears weekly, brush their teeth a few times a week, and trim their nails monthly.

Watch for signs of infection in folds or ears, and pay attention to their anal glands (if you notice scooting or licking, it might be time for a trip to the vet or groomer).

11. They Can Get Along with Other Pets

If raised with cats or other dogs, most Mastiffs are fine. If you’re adding a second dog, opposite sexes tend to get along better. As always, early socialization helps a ton.

Final Thoughts

The American Mastiff is a loyal, loving companion with a calm presence and a big heart. But they’re also a huge responsibility — literally and figuratively. They need time, training, space, and a family who understands their quirks.

If you're okay with drool, shedding, and the occasional bumped-over lamp, you'll find that the Mastiff is one of the most devoted dogs you’ll ever meet. When raised with love, boundaries, and care, they make amazing family members — big goofy grins and all.