It is 2:00 AM, and the house is perfectly still. The only light is the pale white glow of the moon sneaking through the curtains, casting long shadows across two dog beds on the bedroom floor.

On the left, Miller is a monument of composure. He is tucked in with the precision of a Swiss soldier, his big shovel paws folded neatly beneath his chin, his golden fur rising and falling in a slow, dignified rhythm. Then—ever so gently—his lips begin to move. A soft, rubbery flutter. His jaw opens a fraction of an inch, closes, opens again. His teeth chatter in the quietest, most delicate little rhythm, like a tiny castanet solo meant only for an audience of one. He is, at least in his own mind, definitely eating a cookie.

On the right, Modela has already blown past composure entirely. Her long legs are a blur of barely contained chaos—pumping, scrambling, pedaling through some invisible terrain at full speed. Her narrow little nose twitches furiously. Her propeller tail gives a single, urgent thwack against the side of her bed. A soft bark escapes her, hushed and conspiratorial, as if she knows the rules even in her sleep. Somewhere in her dream, a very unfortunate iguana is probably having the worst night of its life.

Two dogs. One room. Two entirely different universes playing out behind their closed eyes.

In the quiet of that moonlit room, it is hard not to wonder: What on earth are they dreaming about?

We may never know for sure what plays on the private movie screens in our dogs’ minds, but based on common sleep behaviors (and a lot of time watching Miller and Modela), we can make some very good, very loving guesses.

Science tells us that dogs go through the exact same sleep cycles as humans, including REM (Rapid Eye Movement) sleep, which is when the most vivid dreaming happens. About 20 minutes into a nap, you’ll see the physical signs: irregular breathing, twitching paws, and soft vocalizations.

But what are they actually dreaming about?

According to the American Kennel Club, dogs frequently dream about their instincts and daily routines. Harvard psychologist Dr. Deirdre Barrett even notes that because dogs are deeply attached to their humans, they likely dream of their owners’ faces, scents, and daily interactions.

If our dogs’ dreams are just reflections of the days we give them, then my two incredibly different dogs—Miller and Modela—live in two entirely separate dream worlds.

🍪 Miller: The Cautious Connoisseur

Dreams of: Cookies

For almost 10 years, Miller has lived a highly structured life of comfort, strict routines, and extreme caution. Living life by his design.

His strategic daily walk consists of a slow stroll around the block on a foot-wide sidewalk. He only veers off his path to avoid stones, gravel, twigs, or sidewalk cracks. If a crack appears larger than it actually is, Miller becomes convinced it poses a threat to suck him into the literal abyss.

Food is the critical epicenter of Miller’s day, and his schedule runs like absolute clockwork:

• Morning Coffee: Commences strictly with 4 cookies.
• 8:00 AM Walk: Features a precise 3-cookie system managed by a well-trained Dad. First is the bribe cookie to get him moving, next is the poo cookie for doing his business, and finally, the home cookie to celebrate not being sucked into the sidewalk abyss.
• 9:00 AM: Breakfast sharp, followed immediately by a nap.
• 11:00 AM & 2:00 PM: Mid-day cookies.
• 5:00 PM: Dinner sharp.
• 6:00 PM: A Whimzee chew.
• 6:05 PM: Miller tucks himself into bed.

🐾 Sleep Style

• The Nighttime Routine: Once Miller falls asleep, the most active he gets is the occasional leg twitch—likely replaying the act of kicking up grass after his business in the park.
• The Bullfrog Vent: At some point in the night, he will venture from his bed to the hardwood floor to catch the cool air from the vent. Soon after, the sounds of an American bullfrog escape him—a deep, resonant, and booming “jug-o-rum” that sounds like a low-pitched cow mooing, creating a perfect rhythmic soundtrack as if he were lying on his own lily pad.

🦎 Modela: The Boundless Adventurer

Dreams of: The Hunt

Modela, on the other hand, has a massive inventory of real-world adventures to dream about. At nearly 9 years old, she still pulls like a sled dog. She wakes up every single morning as if it is her very first day alive, placing her paws right beside my head to will me awake, ready to play all day.

To Modela, food is just fuel. She eats it as quickly as it hits the bowl because she simply has things to do. And that specific “stuff” is hunting.

Iguanas, squirrels, coyotes, javelinas, and geckos—if it’s in the backyard or on the road, it’s fair game. Just ask the chickens in England, or the one she famously ran right into the ocean in the Cayman Islands (sorry, chickens!).

🐾 Sleep Style

• The Nighttime Routine: Because she is a 100% pack dog, Modela often sleeps with one eye open, never fully letting her guard down as she watches her humans. But when she finally surrenders to the comfort of her bed, she is all hunt, all night.
• The Dream Hunter: Built with pieces from all breeds, she is a beautiful contradiction. She has a wide, boxer-like rib cage, long skinny legs, and small bird-like feet. In her sleep, you will see her moving rapidly, leaving no doubt that she is outrunning someone or something.

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🔬 The Science Behind the Sleep

While Miller and Modela share almost no personality traits, they both experience the unique quirks of senior dog sleep. Did you know that size and age change how dogs dream?

• Size Matters: Small dogs have more frequent but shorter dreams, while large dogs dream less often but for longer periods.
• Senior Brains: Puppies and senior dogs twitch and dream much more often. In seniors, the brain is simply processing differently. The neurological switch that usually paralyzes muscles during sleep weakens, letting their daytime adventures bleed into physical movements.

💡 A Quick Safety Tip for Dog Owners: Like humans, dogs can have bad dreams. If you think your dog is having a nightmare, do not wake them up. Startling a dog out of REM sleep can heavily disorient them, which can lead to accidental, defensive snaps or bites. It is always safest to let them wake up on their own.

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👃 The Heart Behind the Brainwaves

Science can track the brainwaves and categorize the sleep cycles, but it’s the love we have for our dogs that lets us decode the rest.

While humans dream mostly in vivid pictures, a dog’s dreamscape is likely painted in smells. A dog’s brain devotes 40 times more space to analyzing scents than ours does. Because dreams are reflections of their waking lives, our dogs aren’t just visualizing their day—they are smelling it in high-definition.

When Miller’s teeth chatter in his sleep, he isn’t just picturing a delicious cookie; his sleeping brain is recreating the rich, savory aroma of peanut butter and baked oats. For Modela, her running paws are tracking a complex, olfactory map. In her mind, she is actively chasing the sharp, musky trail of an iguana or the distinct, dusty scent of a startled chicken, experiencing the thrill of the hunt through her nose long before she ever catches up to it.

In their own beautifully unique ways, their dreams are just reflections of the lives we provide for them—a perfect mixture of instincts, grand adventures, well-timed cookies, and, above all, us.

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What about your dog? Are they a “Miller” or a “Modela” when they sleep?

Let me know in the comments below!