Dog-to-dog leash reactivity is the most common version we see, and one of the most stressful to live with. Your dog spots another dog and erupts: barking, lunging, maybe spinning at the end of the leash. It is exhausting and embarrassing, and it is very fixable with patience and a kind plan from the reactive dog playbook.
First, why it happens
Two very different dogs can look identical at the end of a leash. One is afraid and wants the other dog to go away. The other is friendly but frustrated that the leash will not let them say hi. Both boil over the same way. The leash itself is a big part of the story, which we unpack in why dogs react more on leash than off. The good news is that the plan is nearly the same either way.
The plan
Work under threshold, always
Find the distance where your dog can see another dog and still take food. That under-threshold zone is where every bit of progress is made. Closer than that and you are only rehearsing the explosion.
Reward noticing, then disengaging
Play the engage-disengage game: mark and treat the calm look at the other dog, then reward the look back to you. Over many reps, the sight of a dog starts to mean “check in with my person” instead of “sound the alarm.”
Have an exit ready
When a dog appears too close, too fast, use a calm emergency U-turn and create space. Choosing walking routes with good sight lines means you face far fewer surprise encounters in the first place.
Skip the on-leash greetings
It is tempting to think the fix is more dog friends. For most reactive dogs, forced on-leash greetings are tense, awkward, and likely to backfire. You can build a calm, confident dog who passes others politely without ever doing a nose-to-nose hello on a tight leash.
When to get help
Dog-directed reactivity can sit close to aggression, and if your dog has made contact, redirected onto you, or is escalating, please loop in a professional. Our directory of force-free trainers can match you with someone experienced in dog-dog cases, and the most serious situations may call for a veterinary behaviorist. There is no force-based shortcut here. Pain and intimidation make a frightened dog more dangerous, not less. Learn to read how dogs communicate so you can judge each encounter.
