Why do dogs need so much sleep?
Sleep is your dog's reset. Everything exciting or scary in their day pushes arousal up, and sleep is what brings it back down. A dog getting their 18 to 20 hours starts each walk calm, shakes off big days, and can actually think when you ask something of them.
"More sleep equals less arousal. Simple stuff."
A dog running short doesn't look sleepy, though. They look naughty:
Can't settle
Ignores you outside
Pulls like a train
Evening zoomies
Reacts to everything
"Never seems tired"
I hear about these dogs every day. They get called hyper, stubborn, "a nightmare", sometimes even "separation anxiety". But dogs are results of the lives they're living, and a lot of those lives are running on half the sleep they need. Which brings us to the actual question.
So why isn't your dog sleeping?
You can't make a dog sleep. Sleep happens on its own when the conditions are right. If your dog gets nowhere near 18 to 20 hours, one of three things is usually wrong, and all three are bigger than a "sleep problem".
Reason 1
They're not fulfilled
Every breed was built to do a job. Employ your dog or they'll go self-employed: stealing, digging, shredding, barking at the fence. And a dog with an unfinished job stays on the clock. Dogs on the clock don't sleep.
Reason 2
They're too aroused to switch off
Arousal works like nitro, not fuel. However tired the dog is, if something has spiked them, adrenaline keeps them up, restless and buzzing. A cold shower would do the same to you at 2am. And when arousal goes properly through the roof, that adrenaline can hang around in the blood for up to three days. One mad Saturday can wreck sleep until Tuesday.
Reason 3
The day is shaped wrong
This is the one that catches good owners out. Most dogs' days are full of what I call full stops: play, walk, visitors, dinner, then we expect them to just stop. A dog who's still buzzing when sleepy time arrives won't sleep, even if they're tired and fulfilled. That leftover buzz has to go somewhere, so it becomes the 9pm zoomies, the pillow sucking, the dog humping his bed after dinner. They're trying to bring themselves down, because the day didn't.
The bit people miss
For a dog to sleep, three things have to be true at once: fulfilled, tired, and relatively calm when sleep time comes. Miss one and the sleep doesn't happen. So if your dog isn't sleeping, the sleep is a symptom. Something underneath, their needs, their arousal or the shape of their day, is out of balance. Sort that and sleep turns up on its own. Skip it and no amount of tiring them out will get you there.
Understimulated or over-aroused? Do the test
Give your dog something calming: scattered food to search out, a chew, a lick mat. Then watch what happens.
They settle, and stay settled →
Over-aroused. Something in the day keeps spiking them, and they needed help coming down. Worth asking: what's the cold shower in your dog's day, and why does it keep happening?
They bounce straight back up →
Understimulated. The day isn't meeting their needs, and no calming product fixes a bored dog. Dogs don't suddenly become understimulated, it builds over weeks. Worth asking: what was your dog bred to do, and when did they last get to do it?
Either way, the answer lives in your dog's day. Which is honestly good news. The day is the one thing you can change.