Before a lunge, a worried dog may slow, freeze, turn away, lick their lips when there is no food, or stop responding as usual. These are clues, not a stopwatch or a diagnosis. No one sign means the same thing in every dog. Notice what changed from your dog's usual loose, comfortable movement.
Read the setting with the body
Look at where your dog is looking, how they move, and whether they can choose to turn away. A still dog is not necessarily a calm dog. If you see discomfort, create space from the person or dog ahead. Turn toward a safer route with a loose, secure hold on the leash, rather than forcing a greeting or demanding a sit.
Learn the pattern when things are calm
Afterward, jot down the distance, the setting, and the first change you noticed. There is no guaranteed "three-second warning". Some dogs move from subtle signs to a reaction quickly, and some freeze. Keep people and other animals safely apart if there is bite risk. Ask a veterinarian about a new behavior change and a qualified behavior professional for a plan.
Where should I start?
Choose what fits. Nothing is saved or submitted.
Sources
Sources & care notes
A sudden change in behavior can have a medical cause. If something feels off, check with your vet first.
Frequently asked questions
What are the early signs?
Slowing, freezing, turning away, lip licking with no food nearby, or stopping their usual response. These are clues, not a stopwatch.
Is one sign enough?
No one sign means the same thing every time. Read the setting with the body: where they are looking, how they move, and whether they can choose to turn away.
What do I do when I see them?
Create space from the person or dog ahead. A still dog is not necessarily a calm dog.
How do we learn our dog pattern?
Afterward, jot down the distance, the setting, and the first change you noticed, and build the picture when things are calm.
