Border Collie Seventy dogs. Two years. 1,893 recorded poops, each one logged by researchers who presumably lost some kind of bet.
That is not a joke setup. A team of Czech and German scientists published exactly that study in Frontiers in Zoology back in 2013, and what they found is still being argued about at dog parks and in comment sections a decade later.
Dogs, according to the data, seem to prefer relieving themselves while facing north or south.
Not east. Not west. North or south, lined up along the Earth’s magnetic axis like a furry little compass needle with opinions.
And your Border Collie, the breed that turns every ordinary task into a full choreographed production, may be doing the most thorough version of this ritual you have ever witnessed.
The Study Everyone Cites and Almost Nobody Reads
The researchers tracked 70 dogs across 37 breeds. Over two years they logged 1,893 defecations and 5,582 urinations, which is a sentence I never expected to type.
Here is the part that matters: the alignment only showed up during calm magnetic field conditions.
The Earth’s magnetic field is not a fixed, polite thing. It shifts and wobbles throughout the day, and during periods of instability the dogs’ neat north-south preference vanished completely. They pooped in whatever direction they felt like.
That detail is what made the study interesting rather than dismissible. A random quirk would not switch on and off in sync with geomagnetic activity.
If a behavior disappears the moment the magnetic field gets noisy, the magnetic field was probably never a coincidence.
So the circling might not be indecision at all. It might be calibration.
What the Spinning Might Actually Be Doing
Picture a compass needle settling. It swings past the target, overcorrects, swings back, and gradually narrows in.
Some researchers think the circling is a sensory version of that same process. Your dog turns, gets a reading, adjusts, gets another reading, and eventually parks in the sweet spot.
Which means all those laps around the same patch of lawn are not your Border Collie being dramatic. They may be your Border Collie running diagnostics.
How Would a Dog Even Sense Magnetism?
Nobody has a confirmed answer, and anyone telling you otherwise is guessing confidently.
The leading theory involves cryptochromes, light-sensitive proteins found in the retinas of many animals. In birds, these proteins appear to react to the magnetic field in a way that may create a visible overlay on what the animal sees.
Some scientists suspect certain mammals carry a version of the same hardware.
If that theory holds, your dog might genuinely perceive direction rather than calculate it. Less like reading a map, more like noticing a color the rest of us cannot see.
The Honest Caveat
The 2013 study has never been fully replicated at scale, and plenty of researchers remain skeptical.
Sample size, observer bias, the sheer weirdness of the claim: all fair criticisms.
But magnetoreception in other animals is well documented. Sea turtles navigate with it. Migratory birds rely on it. Foxes appear to aim their pounces along a magnetic line when hunting in deep snow, which is possibly the coolest fact in this entire article.
Dogs having a faded version of that ability is not outlandish. It is just unproven.
The Other Reasons, Which Are Considerably Less Magical
Magnetism is the fun answer. It is almost certainly not the only answer.
Ancestral Grass Flattening
Wild canids trample down vegetation before settling into a vulnerable position. Tall grass hides threats, catches fur, and generally interferes with the process.
Your Border Collie does this on your perfectly mowed lawn because instinct does not check whether the lawn has been mowed.
Scent Marketing
Dogs have scent glands near the anus, and defecation doubles as a message board posting.
Circling spreads that scent across a wider area and presses it into the ground where it lingers longer. The spin is part of the signature.
The Vulnerability Scan
Squatting is the single most defenseless posture a dog can adopt. No running, no fighting, limited visibility.
Turning in a circle gives a full 360 degree survey of the surroundings before commitment. It is a security sweep, performed by an animal who is about to be temporarily useless in a crisis.
Every circle buys another second of awareness, and instinct has never once considered a second wasted.
Simple Comfort Logistics
Sometimes the ground is uneven. Sometimes there is a sharp rock. Sometimes the dog is just picky.
Not every behavior needs a research paper.
Why Border Collies Turn This Into a Whole Thing
Here is where breed matters, and where Border Collie owners start nodding.
A Border Collie’s brain is built around evaluation and adjustment. The herding instinct is fundamentally a loop: observe the situation, make a micro-correction, observe again, correct again, repeat until the outcome is exactly right.
That loop does not switch off when the sheep are absent.
The Perfectionist Problem
Watch a Border Collie approach a doorway, a ball, or a suspicious leaf. There is always a pause. Always an assessment.
Now apply that same processing style to a bathroom decision and you get eleven laps around a shrub while your coffee gets cold.
Other breeds do two or three circles and get on with their day. Your dog is conducting a survey.
Sensitivity Runs High
Border Collies are famously reactive to environmental detail. Sound, movement, light, texture, changes in routine.
If they are also picking up something magnetic, they are exactly the type of dog you would expect to take that input seriously.
The Overthinking Is Real
Anxious or highly stimulated dogs circle more. Border Collies bred for work and living in quiet suburban homes often carry unspent mental energy, and that energy leaks into ordinary behaviors.
More laps can simply mean more brain running with nowhere useful to point itself.
When the Circling Stops Being Charming
Most of this is normal. Some of it is not, and it is worth knowing the difference.
Signs Worth a Vet Appointment
Excessive circling paired with straining, whimpering, or repeated failed attempts can point to constipation, anal gland trouble, or gastrointestinal issues.
Scooting after the fact usually means impacted glands, which is unpleasant, common, and very fixable.
Sudden changes matter most. A dog who circled twice for six years and now circles for four minutes is telling you something.
Age Changes the Picture
Older Border Collies with arthritis or hip discomfort may circle longer because settling into position genuinely hurts.
The behavior looks identical from the outside. The reason underneath is completely different.
A familiar habit that suddenly takes twice as long is not a habit anymore. It is a symptom wearing a costume.
Cognitive decline can also produce aimless circling in senior dogs, often disconnected from bathroom timing entirely.
What To Do With All This
Mostly, nothing. Let the dog spin.
Interrupting the ritual, rushing it, or tugging the leash mid-rotation tends to backfire. Some dogs will hold it and then have an accident indoors later, which serves absolutely nobody.
Give them a consistent spot, a reasonable amount of time, and the courtesy of not staring directly at them, because plenty of dogs are self-conscious about being watched.
A Small Experiment for the Curious
Download a compass app. Next time your dog settles, check the direction they are facing.
Do it for a week and keep a note.
You will probably find more north-south alignment than random chance would explain, and you will definitely find yourself standing in a yard at 6 a.m. holding a phone at a dog. That is science.
The next time your Border Collie takes the scenic route around a patch of grass, remember what might actually be happening in that head: an ancient security check, a scent broadcast, a comfort assessment, and possibly a magnetic reading, all bundled into one absurd little pirouette.