Every dog owner has had a moment of watching their dog do something completely bizarre and thinking, "why on earth is that happening?" Most of these behaviours look strange through human eyes but make perfect sense through a dog's — leftovers from instinct, communication, or simple physical relief. Here are some of the most common ones, decoded.
The pre-lie-down spin
Before settling down, many dogs will turn in a tight circle once or twice — sometimes several times — before flopping. This is thought to be an old instinct from wild ancestors who circled to flatten grass or check the ground before lying down in it. Your sofa doesn't need flattening, but the instinct hasn't got the memo.
Zoomies (the sudden, sprinting madness)
Technically called FRAPs — Frenetic Random Activity Periods — zoomies usually happen after a bath, first thing in the morning, or in the evening. They're a burst of pent-up energy or excitement being released all at once, and while they look chaotic, they're completely normal and generally harmless, as long as the dog has room to run safely.
Butt-scooting across the floor
Amusing to witness, less amusing to explain to guests. Scooting is almost always a sign of irritation around the anal glands — either they need expressing, or there's some other local irritation. Occasional scooting isn't an emergency, but if it's frequent, it's worth a vet check rather than something to just laugh off.
Eating grass
Despite the popular theory that dogs eat grass specifically to make themselves sick, most dogs who eat grass show no signs of nausea beforehand and don't vomit afterward. It seems to be a mix of normal foraging instinct, boredom, and possibly a texture or fibre preference. Occasional grass-eating on pesticide-free grass is generally nothing to worry about.
Head tilting
That classic, slightly comic head tilt when you talk to your dog is thought to help them locate the source of a sound more precisely, and possibly to get a better look at your face and expression past their own muzzle. It's also, frankly, just very good at getting a reaction out of you — which may reinforce it further.
Rolling in something disgusting
From a human perspective, revolting. From a dog's perspective, potentially a very old instinct to mask their own scent with a stronger one — useful for a hunting ancestor trying not to be detected, or simply to "share the news" of an interesting smell with the rest of the pack. Modern dogs mostly just do it to unpleasant effect on a Sunday walk.
Sniffing other dogs' rear ends
Undignified by human standards, essential by canine ones. A dog's rear end holds a huge amount of information — sex, age, health, even diet — via scent glands. This is simply how dogs introduce themselves and gather information about each other, roughly equivalent to a very thorough handshake.
Why understanding this matters
None of these behaviours are misbehaviour — they're communication, instinct, or straightforward biology showing up in ways that look odd out of context. Understanding the "why" behind them means fewer unnecessary worries, and a much better sense of when something is actually a normal quirk versus when it's worth a proper vet check.
The takeaway
Dogs aren't being weird for the sake of it — they're mostly just being dogs, running on instincts that predate the sofa, the lead, and the Sunday dog walk by a long way. Once you know the reasons, the strange stuff usually starts to make a lot more sense.
Got a specific behaviour that's got you stumped? Ask Dash — it's built to explain exactly what your dog is doing and why.
