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Does My Dog Understand No?
Published: April 16, 2026

Q: I tell my dog no when they shred my shoes, and they stop. But it does not last. They just go do something else bad. Should I keep saying no?

A: Chewing is normal for dogs, especially puppies. It does not mean your dog is bad or stubborn. There is a mix-up in how you are talking to each other.

Jack Russell Terrier puppy with chewed up material around the floor near the puppy.

What Does “No” Mean to Dogs?

To your dog, the word “no” is just a sound. It has no meaning on its own. If you do not teach your dog what “no” means, you could use any word and get the same result. At best, “no” works like a sudden noise that makes your dog pause. But it does not teach them what you want them to do instead.

Why a Harsh Tone Can Backfire

If you say “no” in a harsh, deep voice, it can scare your dog. Your dog may stop what they are doing, but only because they are afraid. This can make your dog shut down, avoid you, or lose interest in learning. Over time, it can hurt their confidence and your bond with them.

How Dogs Understand Us

Studies show that dogs process language a lot like people do. They use one part of their brain to understand your words.  They use another part to understand your tone of voice.  When you praise your dog in a happy, excited voice, it lights up the pleasure center in their brain. But if you say the same words in a flat, boring voice, it does not have the same effect. Both your words and your tone need to match for your dog to feel good about it.

Sometimes “No” Gives Your Dog What They Want

For some dogs, any attention is better than no attention. You might say “no” when your dog grabs your shoe. Your dog stops and looks at you. But you just gave them what they really wanted: your attention. Even scolding your dog can reward the behavior you want to stop. This makes it more likely to happen again.

What to Do Instead

Think of your dog’s behavior as a message. Most unwanted behaviors come from a need that is not being met. Your dog might be bored, in pain, or confused. Instead of saying “no” to stop the behavior, ask yourself: What is my dog trying to tell me?

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