Short answer: dogs tilt their heads to hear better and to show they are paying attention. It is normal, and many people find it adorable.
What VCA says
VCA says dogs have ear flaps that partly cover the ear canal, so they may change position to optimize sound. It also says a dog may tilt the head to mentally process what they are hearing, and to show they are engaged, much as a person nods in a conversation.
What the AKC says
The AKC notes that dogs often tilt their heads when you are standing right in front of them, and that researchers do not agree on why. One idea is that a dog's muzzle may block their view, and another is that it depends on how we interact with them.
When to ask a vet
If the head tilt is constant, or your dog also seems unsteady, ask your vet. See emergency signs.
Get the right help
Your vet can check the ears and balance.
This article is general education, not veterinary advice. If your dog seems unwell, is in pain, or something changed suddenly, call your vet. If it could be an emergency, do not wait.
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Sources
Sources & care notes
Frequently asked questions
Why does my dog tilt their head?
To hear better around their ear flaps, to process what they hear, and to show they are paying attention.
Why does it happen when I talk to them?
They are engaged and working out what you mean, and the tilt may even help them see past their muzzle.
When is a head tilt a problem?
When it is constant, or your dog also seems unsteady. That combination goes to the vet.
Should I train the tilt?
No need. It arrives on its own when your dog is interested.
