Why Does My Dog Do That? 12 Confusing Behaviors Explained

Dogs do strange things with total commitment, and most of it makes sense once you know what you're looking at. Here are the twelve questions owners ask most — plus how to tell normal quirk from something worth a vet call.

1. Eating grass

Mostly normal grazing — ancestral habit, fiber-seeking, or plain boredom. Fine in moderation on untreated grass. Frantic gulping followed by vomiting, repeatedly, earns a vet call, and it's worth confirming the lawn hasn't been chemically treated, since herbicide residue is a separate and more serious concern than the grass itself.

2. The head tilt

Partly better sound triangulation, partly working out what you mean — and partly because you melt every time, and dogs notice what gets rewarded. Enjoy it. A tilt that's constant, comes with stumbling or circling, or shows up suddenly in an older dog is a different story — that combination can point to an inner ear or neurological issue worth a same-week vet visit.

3. Zoomies (FRAPs)

Frenetic Random Activity Periods are normal energy releases, common after baths and in the evening. Constant zoomies signal an exercise deficit — see our enrichment ideas. Give a zoomie-prone dog a safe, obstacle-free space to run it out rather than trying to physically intervene mid-lap; most dogs settle on their own within a minute or two.

4. Scooting

Anal gland irritation until proven otherwise; occasionally worms or allergies. Once is nothing; a pattern is a vet visit — glands are a quick fix in experienced hands. Left unaddressed for too long, impacted glands can abscess, which is a far more painful and expensive problem than the routine expression that prevents it.

5. Digging at blankets before lying down

Den-making instinct: ancestors trampled grass and dug cooling pits. Completely normal, even charming, unless your duvet disagrees. Some dogs extend the ritual to circling several times first — also normal, and often more pronounced in older dogs settling stiff joints into a comfortable position.

6. Following you everywhere (including the bathroom)

You're the center of the social universe and doors are suspicious. Normal for companion breeds like Cavaliers; if it comes with panic when you actually leave, read our separation anxiety guide.

7. Head out the car window

A firehose of smells at highway speed — the richest sensory experience available to a nose that rules their world. Fun but risky (debris, sudden stops); crack the window for smell, keep the head inside, use a harness.

8. Rolling in disgusting things

Scent camouflage from their hunting ancestry, or simply broadcasting an exciting find to the pack. No cure, only vigilance and a good bathing routine.

9. Licking you

Affection, grooming instinct, attention-seeking (it works), and the salt on your skin. Excessive obsessive licking of themselves is different — that's allergies, pain, or anxiety territory.

10. Sighing and groaning

Contentment settling, mild protest at being ignored, or just air moving in a relaxed body. New, frequent groaning when lying down in a senior can be joint pain — see the senior care guide.

11. Kicking grass after pooping

Not covering it up — advertising. Scent glands in the paws stamp a signature over the spot. The prouder the kick, the better the day.

12. Chasing their tail

Puppies: play and discovery, totally normal. Adults doing it compulsively — daily, hard to interrupt, with damage — need a vet/behaviorist conversation.

The Rule of Thumb

Weird-but-occasional is almost always fine. Sudden, frequent, or intense changes in any behavior are your dog's only way to file a report — and worth taking seriously. When in doubt, video it and show your vet.

Context matters more than the behavior in isolation. A single zoomie after a bath means nothing; zoomies that appear out of nowhere in a normally mellow senior dog are worth noting. The same logic applies across this whole list — it's the change from your dog's own baseline, not the behavior itself, that separates quirky from concerning. If several odd behaviors from this list show up together, or a familiar one suddenly intensifies, that pattern is worth a conversation with your vet rather than twelve separate ones.